2025-02-12 Bijlage RIB - Achtergronddocument variantenstudie uitvoeringsmethoden
Tekst van het document
Algerabrug Achtergronddocument variantenstudie uitvoeringsmethoden Zaaknummer NOK:
31192219
Deelprojectnaam:
Algerabrug
Beheerobjectcode:
37H-001-01
Referentie Intern:
AB-RAP-Achtergronddocument variantenstudie uitvoeringsmethoden
Versie:
1.0
Documentdatum:
30 oktober 2024
Documentstatus:
Definitief
Opgesteld: Gecontroleerd: Vrijgegeven:
SAMEN, STABIEL EN SLAGVAARDIG
Algemene gegevens: Opdrachtgever:
RWS PPO
Opdracht:
Adviesorganisatie Over-Bruggen
Referentie:
31192224
Gegevens combinatie:
Combinatie Arup - IV - Wagemaker Trapezium 322 | 3364 DL Sliedrecht | Postbus 135 | 3360 AC Sliedrecht T (088) 943 4154 | E infr.aob-aiw@iv.nl (administratie penvoerder))
Versiebeheer Versie
Status:
Datum
Omschrijving wijziging
1.0
Definitief
30/10/2024
Eerste versie
Alle rechten voorbehouden. Niets uit deze uitgave mag worden vermenigvuldigd, opgeslagen in een geautomatiseerd gegevensbestand of openbaar gemaakt in enige vorm of op enige wijze, hetzij elektronisch, mechanisch, door fotokopieën of enige andere manier, zonder voorafgaande schriftelijke toestemming van Combinatie Arup Iv Wagemaker.
Uitvoeringsvarianten
Versiebeheer
Inhoudsopgave
1
Scope & Objectives
1
2
General Approach and Basis of Methods
1
2.1 2.2 2.3
3
Construction Method Variants 3.1 3.2 3.3 3.4
4
4.4 4.5
8
Evaluation Approach .............................................................................................................................. 8 Option A1. Full closure during deck replacement (all modes) ............................................................... 9 Option A2. Partial closure during deck replacement ........................................................................... 11 4.3.1 Option A2-a. Combined Scope Method ................................................................................ 11 4.3.2 Option A2-b. Separated Scope Method ................................................................................ 12 Option A4. Road on high level temporary bridge ................................................................................ 14 Option A6. Offsite Renovation: Road Open / High shipping closed .................................................... 15
Availability 5.1 5.2 5.3 5.4 5.5
5
Options Considered ............................................................................................................................... 5 General Phasing and Availability............................................................................................................ 5 Scope of Works ...................................................................................................................................... 5 Planning Methodology ........................................................................................................................... 7
Evaluation of Construction Method Options 4.1 4.2 4.3
5
Vision / Philosophy ................................................................................................................................ 1 Reference Data ...................................................................................................................................... 1 Scope of works ....................................................................................................................................... 2
17
Option A1. Full closure during deck replacement (all modes) ............................................................. 18 Option A2-a. Partial closure during deck replacement: Half-Half method ......................................... 20 Option A2-b. Partial closure during deck replacement: Separated Scope method ............................ 22 Option A4. Road on high level temporary bridge ................................................................................ 24 Option A6. Offsite Renovation: Road Open / High shipping closed ..................................................... 26
Bijlagen
Bijlage A
Bijlage B
Construction Method Options Bijlage A-1
Option A1
Bijlage A-2
Option A2
Bijlage A-3
Option A3
Bijlage A-4
Option A4
Bijlage A-5
Option A5
Bijlage A-6
Option A6
Bijlage A-7
Option A7
Bijlage A-8
Option A8
Outline Construction Planning Bijlage B-1
Option A1
Bijlage B-2
Option A2
Bijlage B-3
Option A4
Bijlage B-4
Option A6
Bijlage C
Feasibility Study: Road Closure Variants
Bijlage D
Feasibility Study: Over-crossing variant
Bijlage E
Feasibility Study: Removal of Bascule Variants
1
Scope & Objectives
The scope of this report is to present the various construction methods considered for the Over-Bruggen-project at Algerabrug. The technical feasibility and estimated execution durations are evaluation for a number of the variants, to provide information for the multi-criteria assessment (AOB).
2 2.1
General Approach and Basis of Methods Vision / Philosophy
Algera Bridge is located on a major regional road with high traffic intensity and due to the road network, closure of the bridge to road traffic results in a significant detour. The bridge also facilitates cycle and foot traffic, and provides a navigational channel to high shipping. Given the significant hindrance impacts related to closure of the bridge, careful consideration of the likely duration of the construction activities and potential construction methods is necessary. Thus, a number of construction method variants have been identified, with a view to determining a preferred method, based on a multi-criteria analysis. The dominant criteria is hindrance, and the objective is to identify methods which can minimise hindrance as much as possible, while ensuring that the requirements in terms of quality, safety, environment and costs are achieved. The approach in this document is to identify & describe a range of methods, along with an evaluation of the technical feasibility and estimated execution durations associated with these methods.
2.2
Reference Data
The following documents are considered in the evaluation of the construction method:
Table 1: Overview reference documents
Ref [-]
Omschrijving
[ref. 1] [ref. 2] [ref. 3]
AB-RAP-Multicriteria-analyse variantenstudie uitvoeringsmethoden, 30-10-2024, AOB AB-TOM-MCA variantenstudie uitvoeringsmethoden, 30-10-2024, AOB Groslijst, Rijkswaterstaat
As-built drawings Inspections Assessment Reports
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2.3
Scope of works
Unless noted otherwise in the table below, the scope of the works considered in the construction method & phasing plan is based on the groslijst [2] along with additional measures [xx]. Table 2 List of measures included in scope
Measure Maatregel 1
Description
Group
Remarks
Vervangen stalen
Dek constructie
Repairs to langsliggers may avoid the need to
langsliggers hoofdrijbanen
replace the langsliggers. For some options a comparison of estimated duration to repair the langsliggers with replacement is undertaken.
Maatregel 2
Vervangen stalen
Dek constructie
langsliggers fiets/voetpad
Thus, the construction methods/planning assume replacement of langsliggers and timber decking at the cycle/pedestrian with a like for like system. A composite deck (FRP) could be an advantageous alternative : Watertight deck is better for conservation life of the steel underneath, working under that closed deck on paint can be done much better than under a not so closed wooden deck, it is light and it is possible to make is strong enough to withstand all traffic loads without adding weight to the bridge. And putting it in place may be faster than with a wooden deck. Further consideration to this alternative can be given in the next stages of the project.
Maatregel 3
Vervangen stalen
Dek constructie
It is assumed that this scope refers to replacement
voegovergangen
of the rij-ijzers located on the bascule leaf, and
hoofdrijbanen Basculebrug
that no works are required to the rij-ijzers at the pijler or the kelder supports.
Maatregel 4
Vervangen houten
Dek constructie
dek/balken hoofdrijbanen Maatregel 5
Vervangen houten
Dek constructie
dek/balken fiets/voetpad Maatregel 6
Conserveren hoofdligger en
Corrosie protectie
dwarsdragers
It is (currently) assumed that the existing paint system is to be fully removed and the bare steel prepared for primer layer and the double (2-layer) paint coat system. It is assumed to be acceptable to conduct conservation activities under deck with traffic on the carriageway above.
Maatregel 7
Vernieuwen radkeerder
Maatregel 8
Uitvoeren gewichtsmeting Basculebrug
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Barrières en
On bascule bridge only (i.e. not on fixed bridge and
leuningen
approaches)
Beweegbaar
The weight measurement related to the balance of weight (not the total weight). This measure also
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Measure
Description
Group
Remarks includes any adjustments to the variable ballast to provide the necessary balance.
Maatregel 9
Rem reviseren
Beweegbaar
Maatregel 10
Conserveren
Corrosie protectie
vooroppleggingen Maatregel 11
Vervangen hoekstalen
Maatregel 12
Vervangen slijtlaag
the bascule bridge. Barrières en
On bascule bridge only (i.e. not on fixed bridge and
leuningen
approaches)
Wegdek
On bascule & fixed bridge only (i.e. not on
spitsstrook Maatregel 13
Vervangen slijtlaag voet-
approaches) Wegdek
/fietspad Maatregel 14
Vervangen slijtlaag op
Relates to the two bearings located at the nose of
On bascule & fixed bridge only (i.e. not on approaches)
Wegdek
houten dek Maatregel 15
Vervangen gehele
Wegdek
constructie asfalt
On bascule & fixed bridge only (i.e. not on approaches)
hoofdrijbaan Maatregel 16
Injecteren scheuren >
Beton
0.2mm (waarschijnlijk geen scope weg is van Capelle) Maatregel 17
Vervangen onderdelen
Beton
betonschade onder voegdorpel (binnenzijde basculekelder) Maatregel 18
Vervangen voegdorpel
Beton
Scope not clear.
Maatregel 19
Markeer de voegopening
Road surface
doormiddel van een witte streep. (geldt voor alle voegopeningen) Maatregel 20 Maatregel 21
Voorzie de brug van een
Barrières en
schoprand van 100 mm.
leuningen
Voorzie in een witte
Wegdek
Applies only to fiets-/voetpad on bascule bridge.
stopstreep waarachter de fietsers/bromfietsers zich dienen op te stellen. (beide zijden slagbomen basculebrug) Maatregel 22
Voorzie in een witte
Wegdek
stopstreep waarachter het wegverkeer zich dient op te stellen. (locatie M21 en vaste brug bij stoplichten rijbaan Krimpen-->Capelle)
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Description
Group
Remarks
Maatregel
Versterking van de
Consoles
Measures expected at the console – details not
23*
wisselstrook consol
Measure
developed yet. Assumption that it causes some hindrance to above deck works (in addition to below deck works).
Maatregel
Draaipunt conditie
24*
Draaipunt
Not considered in construction method & planning
conditie
Maatregel
Betonreparaties (nog niet
Beton
Not considered in construction method & planning
25*
geïdentificeerd)
Maatregel
Hemelafvoer reparatie
Hemelafvoer
Not considered in construction method & planning
Maatregel
Voorkom zware voertuigen
Consoles
Not considered in construction method &
27*
op het fietspad (e.g
26* planning.
hulpdiensten?) Maatregel
Versterking van de
28*
hoofdliggers of
Consoles
Not considered in construction method & planning
Existing steelwork
Some NDT and local repairs to the existing
drawsliggers NDT and local repairs
steelwork is likely to be necessary. An allowance is included in the indicative planning.
*additional (potential) measure Other assumptions: 1) There are no below deck works at the fixed bridge (truss). 2) There are no measures (other than those associated with the execution) west of the voegdorpel.
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3
Construction Method Variants
3.1
Options Considered
The following options have been considered in the initial long list of construction methods. The options fall into 3 categories: 1) In-situ deck replacement with road closure 2) In-situ deck replacement with over-crossing 3) Off-site deck replacement. Table 3 Construction Method Variants [Long-list] Description
Category
A1
Full closure during deck replacement
In-situ deck replacement with road closure
A2
Cycle/Emergency services open
In-situ deck replacement with road closure
A3
Road traffic on cantilevers
In-situ deck replacement with road closure
A4
Road on high level temporary bridge
In-situ deck replacement with over-crossing
A5
Offsite Renovation: Road closed / High
Off-site deck replacement
Option
shipping open. A6
Offsite Renovation: Road Open / High
Off-site deck replacement
shipping closed A7
New Leaf (like-for-like)
Off-site deck replacement
A8
Renovation of Bascule bridge
Off-site deck replacement
(replacement)
3.2
General Phasing and Availability
For each option the general phasing and availability of the bridge to the various modes of transport during that phase is identified. The summary of the general phasing and availability for each option is given in Table 4, and in more detail within Bijlage A.
3.3
Scope of Works
For all options the same “baseline” scope of works is adopted as defined in Table 2. For some options, due to the methodology, there are additional scope items. In some cases these are permanent works which result in some degree of “added value” over the “baseline” scope.
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Table 4 Construction Method Variants – Overview Option (construction
General description
Assumed Scope (high
Hindrance philosophy
Uncertainties
Assumptions
Full closure of road (all modes) & high-shipping
Other measures may be required which are different or
22 measures cover all scope items.
during deck replacement. Additional hindrance
additional to the "22 measures"
Kelder roof can be used during construction (lifting /
level)
method)
A1: Full closure during deck
All above deck works undertaken in one
replacement
phase with full road closure.
22 measures.
period for high shipping before and after road
supply) works relate to the deck replacement.
closure. A2: Cycle/Emergency
Phased construction stages to ensure that
services open
22 measures.
Phased closure of road(modes). Keep cycle &
Extent of strengthening on cantilevers?
No strengthening of cantilevers necessary;
cycle/foot/emergency (with axle limit)
emergency vehicles open (with diversions). Close
Visseltrook, voet/fietspad, main span?
Diversions/slingers for cycle/wisselstrook are
remains open
main carriageway and wisselstrook (all modes) &
feasible.
high-shipping. A3: Road traffic on
HRB traffic diverted to cantilevers to allow
22 measures +
All road modes moved to cantilever (incl. HRB
Capacity of existing fixed bridge/kelder/approach for
Strengthening of cantilevers is necessary (bascule);
cantilevers
access to main carriageway for deck
strengthening cantilevers of
traffic). High shipping closed.
traffic on the cantilevers not known.
Strengthening of cantilevers is not necessary for
replacement.
bascule +
Feasibility of strengthening the consoles at the bascule
approach bridges (East & West), kelder and fixed
new deck plate to cycleway.
bridge (both cantilevers).
bridge.
Feasibility of temporary safety barriers on cantilevers (weight, working width, restraint). A4: Road on high level
Temporary bridge (bailey bridge) installed
22 measures +
High level bailey bridge carries HRB over existing
Capacity of existing fixed bridge/kelder/approach for
Fixed bridge and kelder can accommodate the extra
temporary bridge.
above the existing bascule leaf to allow
Bailey bridge.
deck. Phased construction for cantilever to keep
ramp construction.
loading from the (temporary) bridge + elevated
cycle/emergency open throughout. High shipping
Vertical alignment restrictions (truss, gradients etc)
carriageway. Cutting and re-attachment of main girders is feasible.
HRB stay open while maintenance works are undertaken at the bascule
closed.
A5: Offsite Renovation:
Bascule leaf is disconnected at the front
22 measures +
Full closure of road (all modes). High-shipping
Strengthening of kelder for counterweight supports.
Road closed / High shipping
wall and renovated offsite. No road access
cutting main girders +
open while leaf is off-site.
Complex cutting of main girders and re-attachment.
open.
is provided during this period, but passage
temporary support to
Lifting complex, weather dependent and requires
of high shipping is possible.
counterweight + heavy
availability of crane. Monument status.
lifting/transport A6: Offsite Renovation:
Bascule leaf is disconnected at the front
22 measures +
Full closure of road (all modes) during girder
Strengthening of kelder for counterweight supports and
Cutting and re-attachment of main girders is feasible.
Road Open / High shipping
wall and renovated offsite. A temporary
bailey bridge (s) + cutting
cutting/attaching & lift in/out. Low level bailey
strengthening of substructure to support bailey bridge.
Only local strengthening required to transfer the
closed
(bailey) bridge is provided period.
main girders +
bridges while leaf offset. High shipping closed
Complex cutting of main girders and re-attachment.
higher reaction forces from the bailey bridge at front
temporary support to
throughout.
Lifting complex, weather dependent and requires
bearings.
counterweight + heavy
availability of crane. Monument status.
lifting/transport A7: New Leaf (like-for-like)
Bascule leaf is disconnected at the front
22 measures +
Full closure of road (all modes) and high shipping
Strengthening of kelder for counterweight supports.
wall and replaced with a new leaf (pre-
+ cutting main girders +
during girder cutting/attaching & lift in/out.
Complex cutting of main girders and re-attachment of
fabricated). No road or high shipping
temporary support to
Duration of period is minimised by prefabrication
new structure. Lifting complex, weather dependent and
access during the period of replacement.
counterweight + heavy
of new leaf.
requires availability of crane. Monument status.
Cutting and re-attachment of main girders is feasible.
lifting/transport A8: Renovation of Bascule
New bascule bridge (incl. counterweight)
Major renovation scope -
Full closure of road (all modes) and high shipping
Overall scope of work uncertain. Extent of modifications
Existing tandbaan / driving principle is retained.
bridge (replacement)
provided, re-newed mechanical and E-IA,
replacement of existing
during kelder roof works and lift in/out of bascule
to mechanical, E-IA and concrete works unknown.
Kelder can be readily adjusted to suit renovated
CE marking of machinery, modifications to
steelwork, mechanical (wtb)
bridge. Duration of period is minimised by
Lifting complex, weather dependent and requires
situation (roof, support locations etc).
concrete works at kelder.
and E-IA systems,
prefabrication of new leaf.
availability of crane. Monument status.
Opsetselt construction provided at counterweight.
modifications to kelder roof and strengthening measures.
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3.4
Planning Methodology
An indicative construction planning has been developed for each category of construction method. The planning is developed to estimate the duration associated with the various hindrance phases that occur in each method. The planning adopt the following main principles: 1.
All activities are based on an estimate of the total work (hours) needed to complete the task, with due consideration of where multiple teams can work efficiently in parallel. The estimate is based primarily on experience from other projects with similar scope and conditions.
2.
Based on the estimated work, the “duration” of the activity is determined (in working days/hours). The start & end dates are calendar dates based on the working calendar and the duration of the work.
3.
The planning uses a 5-day / 8hr per day working week as a basis. For some activities it is likely that weekend and night-time works is appropriate e.g. use of specialised resources or expensive plant.
4.
There are no contingencies (buffers) included in the planning. The estimate of total work is based on a realistic value (i.e. not necessarily optimistic or pessimistic). Thus an allowance for additional time to account for delays should be included; and allowance of circa 25% is considered reasonable at this stage of the design development.
Refer to Bijlage B for details of the indicative construction planning of the emerging preferred options.
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4
Evaluation of Construction Method Options
4.1
Evaluation Approach
Based on the initial multi-criteria evaluation, the following options scored the best per category-type: Category
Option
Description
In-situ deck replacement with road closure
A1
Full closure during deck replacement.
A2
(Cycle/Emergency services open)
In-situ deck replacement with over-crossing
A4
Road & Cycle traffic on high level bailey bridge.
Off-site deck replacement
A6
Offsite Renovation: Road Open / High shipping closed
Thus for these options, a more detailed evaluation has been undertaken of the option, which focuses primarily on the assessing the technical feasibility and estimating the duration necessary to undertake the works. The primary criteria used in the development of the construction methods are: • Safety: the construction methods, bouwlogistics and working durations need to be suitable to ensure the safety of operatives and public at all stages. •
Quality: the execution methods and specification of the works need to be sufficient quality to ensure minimal maintenance/interventions are required for the next 15 years.
•
Speed/hindrance: the construction methods and phasing sequence needs to adopt techniques that ensure the works can be undertaken rapidly and minimising hindrance while ensuring safety & quality, and proportionality in terms of costs and resources.
For each option (selected) a summary of the construction method, main technical risks and planning below.
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4.2
Option A1. Full closure during deck replacement (all modes)
Phases See Table 5 below. Critical Phases: Phase 3= replacement of decking Method: “Deck Replacement” [Phase 3] 3 sub-variants have been considered: Large Crane Medium Crane Repair Langsliggers -Large Crane The general method adopted is to detach the langsliggers under the HRB from the existing steelwork and then remove the langsliggers plus decking in a single lift operation, using a large crane. A crane with a capacity of circa 300t is located on a barge (or similar) in the channel, The full deck (above & below is grit blasted), and Chrome 6 measures are implemented The existing painting system to the steelwork adjacent to the main carriageway and below the langsliggers is replaced with a complete new paint system. The new langsliggers plus decking plus slijtlaag is installed in a single lift operation, and attached to the existing cross girders with a new bolted connection. -Medium Crane Similar to the large crane, the general method adopted is to detach the langsliggers under the HRB from the existing steelwork and then remove the langsliggers plus decking. In this case multiple (smaller) lifts (crica 6) are used to remove the langliggers + decking. A mobile crane circa 150t is position on the kelder roof.
The full deck (above & below is grit blasted), and Chrome 6 measures are implemented The existing painting system to the steelwork adjacent to the main carriageway and below the langsliggers is replaced with a complete new paint system. The new langsliggers are installed in multiple lifts and attached to the existing cross girders with a new bolted connection. Then the timber deck is attached + slijtlaag applied. -Repair Langsliggers Where the condition of the langsliggers is such that the repairs are limited and can be undertaken efficiently, then a method which does not require the removal of the langsliggers is feasible. In this method the existing decking is removed from the langsliggers. The full deck (above & below is grit blasted), and Chrome 6 measures are implemented Repairs to the langsliggers are implemented, and a new painting system applied to langsliggers + steelwork. Then the new timber decking is attached + slijtlaag applied. Parallel activities during Phase 3 include Replacement of the fietspad decking plus langsligger - using a crane and in a single lift operation to remove and to install. Replacement slijtlaag on the wisselstrook. Above deck activities associated with strengthening of wisselstrook console. Replacement of asphalt on the fixed span Replacement of voegdorpel kelder-underpass location. Whitelining
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Refer to Bijlage C for further details.
Sub-variant
Duration (Phase 3) [ days] Excluding contingencies
Large Crane
28
Medium Crane
35
Repair Langsliggers
32.5
Technical Risks / Uncertainties: Risks / Uncertainties
Sub-variant
Availability of large crane to undertake the lifting in/out of the
Large Crane
bascule deck. Extent of repairs to langliggers unknown; 3 days assumed in
Repair Langsliggers
the programme. Capacity of kelder roof to accommodate 150t crane needs to be
Medium Crane
assessed. Poor weather (wind/wave) resulting in delays to large lifting
Large Crane, Medium Crane
operations. Horizontal stabilization system in temporary situation when
Large Crane, Medium Crane
deck (including langsliggers + wind bracing) on HRB is removed. Can painting below deck (main girders, cross girders and
All
consoles) be undertaken while deck is in use? Risk of rain/water coming through the deck, negatively impacting the quality of painting. Concerns regarding the quality/guarantees of the painting executed while there is traffic above. Maatvastheid van dit samengestelde dek
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4.3
Option A2. Partial closure during deck replacement
There are 2 sub-options considered: Option A2-a: Combined Scope method Option A2-b: Separated Scope method Refer to Bijlage C for further details.
4.3.1
Option A2-a. Combined Scope Method
Phases See Table 6 below. Critical Phases: Phase 3 = Replace deck – undertaken in 4 Sub-Phases | Phase 4 = Conservation to existing steelwork (below deck) Method: A phased construction is adopted such that passage for pedestrians, bicycles and emergency vehicle is possible throughout all phases (apart from at critical lifting activities). Multiple sub-phases are adopted in Phase 3, to allow the necessary access to undertake parts of the work, while keeping access open pedestrians, bicycles and emergency vehicles. Generally 3 working zones are defined: North, South and Central. Refer to SK-A2a-001 to 004 for proposed sequencing and configurations. Due to the restricted zones, this variants considers the use of a “medium” crane. Technical Risks / Uncertainties: Risks / Uncertainties
Quality of conservation system if applied with carriageway above open to traffic and exposed to outdoor climate. Most activities related to strengthening the connection of the wisselstrook consoles can be performed from below deck with traffic on the bridge. Final connection of strengthening measure is performed within night closure(s). Can painting below deck (main girders, cross girders and consoles) be undertaken while deck is in use? Impact of weather conditions on painting durations
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4.3.2
Option A2-b. Separated Scope Method
Phases See Table 7 below. Critical Phases: Phase 3 = Replace deck | Phase 4 = Conservation to existing steelwork (below deck) | Phase 5 = Re-painting of main girders above deck Method: A phased construction is adopted such that passage for pedestrians, bicycles and emergency vehicle is possible (apart from at critical activities). In order to increase availability for road vehicles are works under deck before and after deck replacement conducted with all carriageways open. Several activities are carried out in parallel above deck during one major closure of HRB (Phase 3). Refer to SK-A2b-001 to 005 for proposed sequencing and configurations. Method: “Replace deck” [Phase 3] Parallel activities in phase 3 include: Replace deck HRB (including radkeerder, drainage channels, local repainting of cross girders). Replace deck bicycle cantilever. Replace voegdorpel. Replace wearing surface on fixed bridge (including making white lines). Tuning of rijijzers. Revision to M&E (brakes) Method: “Conservation to existing steelwork (below deck)” [Phase 4] Conservation to existing steelwork below deck (cross girders and main girders) includes setup of enclosure (Chrome 6 measure), sand blasting, apply primer and double coating. It is assumed that the activities can be performed with the carriageway above open to traffic.
This reduces the hindrance to road traffic (cars, public transport & trucks) by 15-20 days, but may have an impact on the quality of the conservation system. Method: “Re-painting of main girders above deck” [Phase 5] As a measure to reduce the hindrance, re-painting of the part of main girders above deck is conducted in staged manner at night-time. Within a night-time closure of one lane of the main carriageway and one of the cantilevers a conservation tent is put above the section of one of the main girders. The part is subsequently sand-blasted and painted before opened to traffic the following morning. Two more layers of paint are applied at upcoming nights (without enclosure). Technical Risks / Uncertainties: Risks / Uncertainties
Quality of conservation system if applied with carriageway above open to traffic and exposed to outdoor climate. Most activities related to strengthening the connection of the consoles can be performed from below deck with traffic on the bridge. Final connection of strengthening measure is performed within night closure(s). Extent of traffic measures required to re-paint with night-time closures.
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Risks / Uncertainties
Can painting below deck (main girders, cross girders and consoles) be undertaken while deck is in use?
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4.4
Option A4. Road on high level temporary bridge
Phases See Table 8 below. Critical Phases: Phase 3 =install oversteek | Phase 4 = replace decking | Phase 5=remove oversteek Method: The general method adopted is to install a temporary bridge above the existing bascule to allow the HRB remain open while the deck replacement and other repairs are undertaken at the existing bascule. The temporary bridge (road level) is circa 3m above the existing road level, so needs significant ramp construction on the approaches. The replacement of the cycleway decking + langsliggers is undertaken prior to the HRB works, using a medium crane with the cyclists/pedestrians temporarily on the wisselstrook. The method of replacing the timber decking and langsliggers is by using manual/small lifting equipment below the temporary bridge and using the adjacent wissselstrook for access. Thus the wisselstrook is not open while the HRB temporary bridge is present. During the grit-blasting and painting of the existing bascule, there is assumed to be access for cyclists/pedestrians. Also, during heavy lifting operations there will be restrictions on cyclist/pedestrian access. Parallel activities during Phase 3 to Phase 5 include: Replacement slijtlaag on the wisselstrook. Above deck activities associated with strengthening of wisselstrook console. Replacement of asphalt on the fixed span Replacement of voegdorpel kelder-underpass location.
Whitelining Refer to Bijlage D for further details. Technical Risks / Uncertainties: Risks / Uncertainties
Capacity of existing structures to accommodate temporary bridge & ramps. Suitability of temporary alignment – gradients, sight stopping distances, barriers etc Restrictions on operatives working below temporary bridge (noise, dust, vibrations etc). Poor efficiencies due to limited access for lifting equipment / heavy plant.
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4.5
Option A6. Offsite Renovation: Road Open / High shipping closed
Phases See Table 9 below. Critical Phases: Phase 3 = removal of leaf | Phase 4 = temporary bridges | Phase 5=re-installation of leaf Method: “Leaf Repair & Deck Replacement Off-site” 2 sub-variants have been considered: Cutting leaf in front of pivot point (river side) Cutting leaf behind pivot point (near counterweight) - Cutting leaf in front of pivot point (river side) The general method adopted is to cut the main girders circa 3m from the kelder front wall, and to transport the leaf to an off-site location. At this location the deck & langsliggers are replaced along with the other measures (conservation, console strengthening etc). To remove the leaf, temporary supports are needed in the counterweight and in front of the kelder. The leaf is assumed to be removed using barges with jacking towers/frames. The remaining part of the bascule requires repairs on site – this includes part of the main girders above the kelder, the draaipunt, tail-piece and the end-cross girder. On site works includes conservation, preparations for re-connection and strengthening of wisselstrook console at the end cross girder. 3 temporary bridges are provided while the leaf is being repaired off-site. These bridges provide access for cyclists, HRB (2 lanes) and wisselstrook (1 lane). The temporary bridges are assembled on the kelder roof and installed using a large crane on a barge.
As part of the main girder is left on site and above deck, the temporary bridges are slightly higher than the existing bridge on the pivot-point side. Following repair of the leaf/deck replacement off site, the leaf is transported back to the bridge location. The temporary bridges are removed, and the leaf re-positioned using barges and jacking towers/frames. The main girder is re-attached, using a bolted splice at the cut location. The deck also needs to be attached to the end cross girder. The part the main girder near the connection is repainted. - Cutting leaf behind pivot point (river side) This method is generally similar, except the cut position is located behind the pivot point. This allows the entire leaf (all cross girders) and the main girder at the pivot point to be removed and repaired off site. The pivot point is subsequently detached and the bridge is lifted out with the axle. To lift out the bridge with the axle, part of the kelder wall needs to be removed. Removing the axle is deemed unfeasible due to limited space in the on the sides next to the draaipunt. This method enables grit-blasting and re-painting of most of the bascule off-site (with the exception of the ballast-kist and a small portion of the tail-piece).
Parallel activities during Phase 5 include Grit-blasting and painting portion of bascule (cut in front of pivot point variant only) Replacement of asphalt & slijtlaag on the fixed span Replacement of voegdorpel kelder-underpass location. Whitelining Refer to Bijlage E for further details.
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Sub-variant
Cutting leaf in front of pivot point
Duration (Phase 3) [ days]
Duration (Phase 3) [ days]
Excluding contingencies
Excluding contingencies
6
13
10
9
(river side) Cutting leaf behind pivot point (near counterweight)
Technical Risks / Uncertainties: Risks / Uncertainties
Sub-variant
Availability of barge crane to undertake the lifting in/out of the
All
temporary bridges Feasibility of removing/re-installing axle at existing pivot
Cutting leaf behind pivot point
point. Bolted connection, fitted connect may not be possible to remove without intrusive measures – making the existing components un-usable, and adding additional time. Available space to remove pivot hub through existing slot in
Cutting leaf behind pivot point
kelder. Poor weather (wind/wave) resulting in delays to large lifting
All
operations and/or transport. Can painting of cyclepath consoles be undertaken while there
All
are pedestrians/cyclists above? Visual appearance of bolted splice (heritage status)
Cutting leaf in front of pivot point
Alignment and ramp impacts for HRB/Wisselstrook temporary
Cutting leaf in front of pivot point
bridge (e.g. capacity of kelder roof) Tolerances for new connection is critical. A small
Cutting leaf behind pivot point
misalignment can have a big impact on the driving mechanism. Material quality and weldability of existing steel.
All
Monument status.
Cutting leaf in front of pivot point
Limited space in kelder to make support ballast kist and make
Cutting leaf behind pivot point
connection. Capacity of existing structures to accommodate temporary bridge.
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5
Availability
Durations: are based on working days; thus 5 days = 1 week. Working day duration is assumed to be typically 8hrs – but can extend to 12-16hrs where critical activities are being undertaken. The durations indicated in the tables below come from the indicative construction plannings, and are without contingencies or other allowance for delays/additional scope etc. Additionally durations may also be required for reliability of communications with stakeholders.
Refer to Bijlage B for details of the indicative construction planning.
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5.1
Option A1. Full closure during deck replacement (all modes)
Table 5 Planning summary Option A1: Large Crane sub-variant Phase
Fase 1 - Wegverkeer en scheepvaart
Hindrance
Main Scope
None
Mobilisation
High Shipping only
Install access/painting enclosures below deck.
Working days
10 (arbitrary)
niet gestremd Fase 2 - Scheepvaart onder basculebrug gestremd
10.5
Concrete repairs in kelder (part) High Shipping & Road
Replace deck + replace /repair langsliggers on HRB.
(all modes)
Replace decking + langsliggers at Fietspad. Replace surfacing on HRB, wisselstrook & fietspad [Bascule +
Fase 3 - Wegverkeer en scheepvaart
Fixed Bridge]
gestremd
28
Replace voegdorpel. Grit-blasting (full deck, excl steel in kelder) Painting to existing steelwork (above deck)
Fase 4 - Scheepvaart onder basculebrug gestremd + short duration hindrance to wegverkeer Fase 5 - Wegverkeer en scheepvaart
High Shipping only;
Conservation to existing steelwork (below deck) and inside
Short-term hindrance to
kelder.
Road (all modes) during
Adjustment to brakes. Weighing/balancing/testing bascule.
testing/weighing
Removal of temporary works.
None
De-mobilisation
10 days (arbitrary)
niet gestremd Totals
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29.5 days
Overall
106.5 days
HRB
28 days
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Phase1
(De-)Moblisation Below Deck Works (days) Above Deck Works (days)
Phase 2
Phase 3
10.5
29.5* 28
*short duration closures to bascule bridge during testing of bridge opening/closing system
High Shipping: 68days HRB + Wisselstrook 28days Cycle + Pedestrians: 28days
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Phase 5
5.2
Option A2a. Partial closure during deck replacement: Combined method
Table 6 Planning summary Option A2a-combined scope: Medium Crane sub-variant Phase
Fase 1 - Wegverkeer en
Hindrance
Main Scope
None
Mobilisation
High Shipping only
Install access/painting enclosures below deck.
Working days
Concrete repairs in kelder.
basculebrug gestremd High Shipping & HRB
Part removal of HRB decking + langsliggers;
Sketches
10 (arbitrary)
scheepvaart niet gestremd Fase 2 - Scheepvaart onder
Issues / Risks
10.5 SK-A2a-001
Potential short duration
Re-painting of Wisselstrook deck+consoles; Repainting of main girder (North)
Fase 3 – HRB Wegverkeer en
closures to
Strengthening of wisselstrook console
scheepvaart gestremd: Fase 3A
cycle/ped/emergency
20
vehicles during heavy lifting operations
Fase 3 – HRB Wegverkeer en scheepvaart gestremd: Fase 3B
High Shipping & HRB
Remove remainder of HRB decking + langsliggers.
Potential short duration
Re-painting top flange of cross girders
SK-A2a-002
closures to
9
cycle/ped/emergency vehicles during heavy lifting operations
Fase 3 – HRB Wegverkeer en scheepvaart gestremd: Fase 3C
High Shipping & HRB
Install temporary bridge for cyclists / and temp bridge for pedestrians.
Potential short duration
Replace fietspad deck+langsliggers
closures to
Repaint fietspad consoles; Repainting of main girder (North)
cycle/ped/emergency
SK-A2a-003
17
vehicles during heavy lifting operations
Fase 3 – HRB Wegverkeer en scheepvaart gestremd: Fase 3D
High Shipping & HRB
Install new deck + langsliggers at HRB.
Potential short duration
Asphalting to fixed bridge
SK-A2a-004
closures to
10
cycle/ped/emergency vehicles during heavy lifting operations High Shipping
Below deck re-painting.
Fase 4 - Scheepvaart onder
Short-term hindrance to
Adjustments to breaks (M&E works)
basculebrug gestremd
Road (all modes) during
Re-balancing and testing of bridge.
32
testing/weighing Fase 5 - Wegverkeer en
None
De-mobilisation
10 days (arbitrary)
scheepvaart niet gestremd Totals
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Overall (excluding de/mobilisation)
102.5 days
HRB
56 days
High Shipping
102.5 days
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Option A2a: Combined Scope Phase1
(De-)Moblisation Below Deck Works (days) Above Deck Works (days)
Phase 2
Phase 3
10.5
32** 56*
*HRB + wisselstook closed *Cyclepath open – with potential short duration closures during heavy lifting operations *Emergency vehicles open (with load restriction) - with potential short duration closures during heavy lifting operations
**short duration closures to bascule bridge during testing of bridge opening/closing system
High Shipping: 103.5days HRB 56days cycle: 0 days
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Phase 5
5.3
Option A2-b. Partial closure during deck replacement: Separated Scope method
Table 7 Planning summary Option A2b-separated scope: Large Crane sub-variant Phase
Fase 1 - Wegverkeer en
Hindrance
Main Scope
None
Mobilisation
High Shipping only
Install access/painting enclosures below deck. Install temporary bridge for cyclists/pedestrians
Working days
Concrete repairs in kelder.
basculebrug gestremd
Sketches
10 (arbitrary)
scheepvaart niet gestremd Fase 2 - Scheepvaart onder
Issues / Risks
SK-A2b-001 10.5
SK-A2-006
Set-up for large crane High Shipping & HRB
Replace deck + langsliggers on HRB; Replace radkeerder / drainage channels.
SK-A2b-002
Potential short duration
Local painting of later inaccessible areas. Replace deck + langsliggers at Fietspad.
SK-A2b-003
Fase 3 – HRB Wegverkeer en
closures to
Replace surfacing on HRB & fietspad [Fixed Bridge]
scheepvaart gestremd
cycle/ped/emergency
Replace voegdorpel. (? Scope not clear ?_
vehicles during heavy
Revision to M&E (brakes)
13.5
SK-A2-006
lifting operations
Fase 4 - Scheepvaart onder basculebrug gestremd | HRB wegverkeer niet gestrremd
High Shipping;
Weighing/balancing/testing bascule.
Restrictions on HRB while undertaking
SK-A2b-004
Wisselstrook hindrance
Strengthening works to Wisselstrook console.
strengthening to wisselstrook consoles?
SK-A2-006
(closed) for 11 days.
New surfacing wisselstrook (bascule + fixed bridge)
Short-term hindrance to
Conservation to existing steelwork (below deck) and inside kelder.
Road (all modes) during
Removal of temporary works below deck.
29.5 days
testing/weighing
Fase 5 - Scheepvaart niet gestremd | Road hindrance at night-time only
Fase 6 - Wegverkeer en
HRB /Wisselstrook
Re-painting of main girders above deck.
SK-A2b-005
hindrance at night time
Re-painting of main girders at slot (in open position)
SK-A2-006
(16 nights);
20 days
Full closure at night time (4 nights) None
De-mobilisation
10 days (arbitrary)
scheepvaart niet gestremd Totals
Overall (excluding de/mobilisation)
73 days
HRB
13.5 days (excluding night time closures)
High Shipping
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53 days
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Option A2b: Combined Scope Phase1
(De-)Moblisation Below Deck Works (days) Above Deck Works (days)
Phase 2
Phase 3
10.5 13.5*
* Cycle/Ped & emergency vehicles open: – with potential short duration closures during heavy lifting operations **Wisselstrook closed for 11 days ***Night-time closures of HRB (20 nights) **short duration closures to bascule bridge during testing of bridge opening/closing system
High Shipping: 73days HRB 13.5days cycle: 0
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Phase 4
Phase 5
29**
20***
5.4
Option A4. Road on high level temporary bridge
Table 8 Planning summary Option A4: Hindrance
Main Scope
None
Mobilisation
Fase 2 - Scheepvaart onder basculebrug
High Shipping closed.
(Temporary) Works in kelder & below bascule in preparation for later
gestremd
Cyclists + Pedestrian: open on
phases.
wisselstrook;
Replacement of fietspad deck.
Wisselstrook closed for vehicles.
Cycle/foot traffic temporarily on wisselstrook.
Fase 3 - Wegverkeer en scheepvaart
High Shipping closed;
Install oversteek system
gestremd
[HRB + Wisselstrook] traffic closed.
Fase 4 - Wegverkeer en scheepvaart
High Shipping closed;
Replace decking + langsligger on HRB bascule.
gestremd
[Wisselstrook] traffic closed;
Re-painting to above deck works and to cyclepath consoles.
Phase
Fase 1 - Wegverkeer en scheepvaart niet
Duration
10 days (arbitrary)
gestremd
36.5 days
10.5 days
39 days
HRB open with load limit; Cyclepath -closed during gritblasting & painting [local] (20 days) Fase 5 - Wegverkeer en scheepvaart
High Shipping closed;
Remove oversteek system
gestremd
[HRB + Wisselstrook] traffic closed.
Replace asphalt HRB and slijtlaag wisselstrook. Replace/repair voegdorpel.
Fase 6 - Scheepvaart onder basculebrug
High Shipping;
Adjustment to brakes. Weighing/balancing/testing bascule.
gestremd
Short-term hindrance to road (all modes)
Conservation works to steelwork in kelder and remaining steelwork
during testing/weighing
below deck.
11.5 days
21 days
Removal of temporary works. Fase 7 - Wegverkeer en scheepvaart niet
None
Demobilisation
10 days (arbitrary)
gestremd Totals
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Overall
138.5 days
HRB
22 days
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Option A4 Phase 1
Phase 2
(De-)Moblisation Below Deck Works Oversteek Above Deck Works
Phase 3
11.5 39**
*Includes replacement of cyclepath deck+langliggers and temporary diversion of cyclists/pedestrians to wisselstrook
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Phase 6
21 10.5
High Shipping: 118.5days HRB 22days Cycle: 20+22 = 42
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Phase 5
36.5*
** HRB open with load limit for full phase **Wisselstrook closed for full phase **Cyclepath -closed during gritblasting & painting [local] (20 days)
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Phase 7
5.5
Option A6. Offsite Renovation: Road Open / High shipping closed
Table 9 Planning summary Option A6: Cut behind pivot point sub-variant Phase
Fase 1 - Wegverkeer en scheepvaart niet
Hindrance
Main Scope
None
Mobilisation
High Shipping only
Works in kelder & below bascule in preparation for Phase 3 – including
Duration
gestremd
Sketches
10 days (arbitrary)
gestremd Fase 2 - Scheepvaart onder basculebrug
Issues / Risks
temporary supports at counterweight, restraint frame/access at cut location, jacking frame/restraints at nose. Set up for float out.
SK-A6-001 25.5 days
Temporary supports for temporary bridge. Make openings in front wall. Deformation of existing structure after
Fase 3 - Wegverkeer en scheepvaart
High Shipping & Road traffic (all
Cut main girders.
gestremd
modes).
Remove bascule (excluding counterweight).
Fase 4 - Scheepvaart onder basculebrug
High Shipping only.
Repair bascule off-site.
gestremd.
Reduced cross-section for wisselstrook
(Temporary) Works in kelder & below bascule in preparation for Phase 5
and cyclepath
Prepare main girder for re-connection.
10 days
SK-A6-002
cutting. Weather delays
Install temporary bridges.
SK-A6-003 35 days (arbitrary)
Concrete repairs inside kelder Fase 5 - Wegverkeer en scheepvaart
High Shipping & Road traffic (all
Remove temporary bridges. Float in repaired bascule, re-insert pivot
gestremd
modes).
point axle, and re-attach main girders. Surfacing works at fixed bridge and kelder
Alignment of existing bridge at connection 8.5 days
High Shipping
Adjustment to brakes. Weighing/balancing/testing bascule.
gestremd + surfacing wisselstrook &
Short-term hindrance to Road (all
Conservation works to steelwork in kelder.
fietspad
modes) during testing/weighing
Removal of temporary works.
Fase 7 - Wegverkeer en scheepvaart niet
None
Demobilisation
Totals
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Overall (excluding de/mobilisation)
100 days
HRB
18.5 days
High shipping
100 days
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Season/weather delays – surfacing. SK-A6-005
21 days
10 days (arbitrary)
gestremd
location. Weather delays: Wind – lifting /floating
Replace voegdorpel (scope not clear) Fase 6 - Scheepvaart onder basculebrug
SK-A6-004
Option A6 (Cut behind pivot point) Phase 1
Phase 2
(De-)Moblisation Below Deck Works (Re-)Place Basecule Above Deck Works
Phase 3
10
9 35
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Phase 6
21*
*short duration closures to bascule bridge during testing of bridge opening/closing system
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Phase 5
25.5*
High Shipping: 100.5days HRB 19days Cycle: 19days
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Phase 7
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Bijlage A
Uitvoeringsvarianten
Construction Method Options
blad A-2
Option (construction method) A1: Full closure during deck replacement.
General description
A2: Cycle/Emergency services open
Phased construction stages to ensure that cycle/foot/emergency (with axle limit) remains open
A3: HRB traffic on cantlievers
HRB traffic diverted to cantilevers to allow 22 measures + strengthening cantilevers of bascule + access to main carriageway for deck new deck plate to cycleway. replacement.
All road modes moved to cantilever (incl HRB traffic). High shipping closed.
A4: HRB traffic high level bailey bridge.
Temporary bridge (bailey bridge) installed 22 measures + above the existing bascule leaf to allow Bailey bridge. HRB stay open while maintenance works are undertaken at the bascule
High level bailey bridge carries HRB over existing deck. Phased construction for cantilever to keep cycle/emergency open throughout. High shipping closed.
All above deck works undertaken in one phase with full road closure
Assumed Scope (high level) 22 measures.
Hindrance philosophy Uncertainties Full closure of road (all modes) & highOther measures may be required which are shipping during deck replacement. Additional different or additional to the "22 measures" hindrance period for high shipping before and after road closure.
22 measures.
Phased closure of road(modes). Keep cycle & Extent of strengthening on cantilevers? emergency vehicles open (with diversions). Visseltrook, voet/fietspad, main span? Close main carriageway and wisselstrook (all modes) & high-shipping
A5: Offsite Revovation: Road closed / High Bascule leaf is disconnected at the front shipping open. wall and renovated offsite. No road
A6: Offsite Revovation: Road Open / High shipping closed
Capacity of existing fixed bridge/kelder/approach for traffic on the cantlievers not known. Feasibility of strengthening the consoles at the bascule bridge (both cantilevers). Feasibility of tempoary safety barriers on cantilevers (weight, working width, Capacity of existing fixed bridge/kelder/approach for ramp construction. Vertical alignment restrictions (truss, gradients etc)
22 measures + cutting main girders + access is provided during this period, but temporary support to counterweight + heavy lifting/transport passage of high shipping is possible.
Full closure of road (all modes). High-shipping Strengthening of kelder for counterweight open while leaf is off-site. supports. Complex cutting of main girders and reattachment
Bascule leaf is disconnected at the front 22 measures + wall and renovated offsite. A temporary bailey bridge (s) +cutting main girders + temporary support to counterweight + (bailey) bridge is provided period.
Full closure of road (all modes) during girder Strengthening of kelder for counterweight cutting/attaching & lift in/out. Low level bailey supports. bridges while leaf offset. High shipping closed Complex cutting of main girders and rethroughout. attachment
heavy lifting/transport
A7: New Leaf (like-for-like)
Bascule leaf is disconnected at the front 22 measures + +cutting main girders + wall and replaced with a new leaf (pretemporary support to counterweight + fabricated). No road or high shipping access during the period of replacement. heavy lifting/transport
Full closure of road (all modes) and high shipping during girder cutting/attaching & lift in/out. Duration of period is minimised by prefabrication of new leaf.
Strengthening of kelder for counterweight supports. Complex cutting of main girders and reattachment of new structure
A8: Renovation of Bascule bridge (replacement)
Overall scope of work uncertain. Extent of New bascule bridge (incl counterweight) Major renovation scope - replacement of Full closure of road (all modes) and high modifications to mechanical, E-IA and provided, re-newed mechanical and E-IA, existing steelwork, mechanical (wtb) and E- shipping during kelder roof works and lift CE marking of machinery, modifications IA systems, modifcations to kelder roof and in/out of bascule bridge. Duration of period is concrete works unknown. strengthening measures. minimised by prefabrication of new leaf. to concrete works at kelder.
Assumptions 22 measures cover all scope items. Kelder roof can be used during construction (lifting / supply) works relate to the deck replacement.
Risks - Many construction activities on the critical path and closure to all means of traffic over the bridge. Unexpected delays or scope creep likelty to result in longer hindrance. - Deck lifted out in one piece -> Availability of crane. Weather during lifting. Supporting crane. - Painting under deck with traffic: Quality of paint. No strengthening of cantlievers necessary; - Deck lifted out in one piece -> Availability of crane. Weather during Diversions/slingers for cycle/wisselstrook are lifting. Supporting crane. feasible. - Painting under deck with traffic: Quality of paint. - Many changes in traffic divertions. Sometimes for shorter periods (nights). - Strengthening to consoles required. Strengthening of cantilevers is necessary - Requires much strengthening to consoles. On both basule and (bascule); Strengthening of cantilevers is not fixed bridge. Prolonged hindrance on waterway. Expensive. necessary for approach bridges (East & West), - Design and execution not possible within timeline for overbruggen. kelder and fixed bridge. - Bascule bridge is heavier after required strengthening. Rebalancing required. Is there sufficient space in ballast kist for more weight? - Many different traffic devaition solutions required. Confusing for Fixed bridge and kelder can accommodate the - Capacity of existing structures to support temporary bridges.
extra loading from the (temporary) bridge + - Alignment, gradients, stopping distances, barriers etc. for elevated carriageway. temporary, elevated, bridges. - Quality of paint uncertain.
Safety Risks - Most activities taking place on bridge (above water, high). - Working conditions for painting under deck with traffic
Cutting and re-attachement of main girders is feasible.
- Lifting operations. - Limited space in kelder. Difficult to weld etc.
- Cutting and re-connecting leaf technically difficult. - Tolerances for new connection very important. - Monoment status (cut before pivot point). - Lifting operations challanging. Availability of crane. Weather dependent. - Risk of scope-creep. - Recalculation required? - Preperation work not feasible within timeline for project. - Material quality, weldability, deformation. - Many construction activities on the critical path and closure to all means of traffic over the bridge. Unexpected delays or scope creep likelty to result in longer hindrance. Cutting and re-attachement of main girders is - Cutting and re-connecting leaf technically difficult. feasible. - Tolerances for new connection very important. - Monoment status (cut before pivot point). - Lifting operations challanging. Availability of crane. Weather dependent. - Risk of scope-creep. - Recalculation required? - Much design work needed. Technical feasbility and amount of temporary works. - Preperation work not feasible within timeline for project. - Material quality, weldability, deformation. Cutting and re-attachment of main girders is - Cutting and connecting leaf technically difficult. feasible. - Tolerances for new connection very important. - Monoment status (cut before pivot point). - Lifting operations challanging. Availability of crane. Weather dependent. - Risk of scope-creep. - Much design work needed.
Technical feasbility and amount of temporary works. - Preperation work not feasible within timeline for project. - Material quality, weldability, deformation. Existing tandbaan / driving principle is retained. - Cutting and connecting leaf technically difficult. Kelder can be readily adjusted to suit renovated - Tolerances for new connection very important. situation (roof, support locations etc). - Monoment status (cut before pivot point). Opsetselt construction provided at - Lifting operations challanging. Availability of crane. Weather counterweight. dependent. - Scope-creep, CE-marking, design work, additional functionality, fixed bridge, approach bridges, mechanical equipment. - Much design work needed. Technical feasbility and amount of temporary works. - Preperation work not feasible within timeline for project. - Material quality, weldability, deformation.
- Most activities taking place on bridge (above water, high). - Construction site with traffic passing nearby. - Working conditions for painting under deck with traffic. - Night work. - Most activities taking place on bridge (above water, high). - Construction site with traffic passing nearby.
- Traffic safety on high-level temporary bridges. - Working conditions working below temporary bridge.
- Lifting operations. - Limited space in kelder. Difficult to weld etc.
- Lifting operations. - Limited space in kelder. Difficult to weld etc.
- Lifting operations. - Limited space in kelder. Difficult to weld etc.
Bijlage A-1 Option A1
Uitvoeringsvarianten
blad A-3
Construction
Stage
Method
Stage no.
A1: Full closure during deck replacement. A1: Full closure during deck replacement.
Hindance
Activities Stage Name 1 Mobilisation & set up
Reference N/A
Scope General prepartation - set up of compound etc
2 Preparation for deck replacement
Maatregel 16 Injecteren scheuren > 0.2mm (waarschijnlijk geen scope weg is van Capelle)
Notes
Road Traffic
Shipping Traffic
No hindrance
No hindrance
No hindrance to road/cycle/foot traffic
High Shipping closed No hindrance to main channel
Maatregel 17 Vervangen onderdelen betonschade onder voegdorpel (binnenzijde basculekelder) Install work ponton below bascule bridge Extra A1: Full closure during deck replacement.
3 Above Deck Works
Maatregel 1
Vervangen stalen langsliggers hoofdrijbanen
off-site
Maatregel 6
Conserveren hoofdligger en dwarsdragers
above deck
Maatregel 2 Maatregel 5 Maatregel 6 Maatregel 20 Maatregel 18 Maatregel 4 Maatregel 3
Vervangen stalen langsliggers fiets/voetpad Vervangen houten dek/balken fiets/voetpad Conserveren hoofdligger en dwarsdragers Voorzie de brug van een schoprand van 100 mm. Vervangen voegdorpel Vervangen houten dek/balken hoofdrijbanen Vervangen stalen voegovergangen hoofdrijbanen Basculebrug
off-site off-site below deck off-site full width off-site Is this at the fixed bridge or the bascule? off-site
Maatregel 7 Vernieuwen radkeerder Maatregel 15 Vervangen gehele constructie asfalt hoofdrijbaan Maatregel 19 Markeer de voegopening doormiddel van een witte streep. (geldt voor alle voegopeningen) Maatregel 21 Voorzie in een witte stopstreep waarachter de fietsers/bromfietsers zich dienen op te stellen. (beide zijden slagbomen basculebrug) Maatregel 22 Voorzie in een witte stopstreep waarachter het wegverkeer zich dient op te stellen. (locatie M21 en vaste brug bij stoplichten rijbaan Krimpen->Capelle) Maatregel 12 Vervangen slijtlaag spitsstrook A1: Full closure during deck replacement.