f001 - approval in principle · at f001 stage it is proposed that the layout, level and position of...

F001 - Approval in Principle Gospel Oak to Barking Electrification Overbridge 14 Deck Lift ELR: TAH1

Mileage: 3m 61ch

129178-JMS-FO1-ECV-000003

Revision A01

December 2016

Document Control Sheet

Project Name: Gospel Oak to Barking Electrification Overbridge 14 Deck Lift Project Number: 129178 Report Title: F001 - Approval in Principle Report Number: 129178-JMS-FO1-ECV-000003

Issue Status/Amendment

Prepared Reviewed Approved

A01– First Issue

Name: Richard Bodenham

Name: Jeffrey Smith

Name: Jeffrey Smith

Date: 29-11-16 Date: 29-11-16

Date: 29-11-16

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Project Name Gospel Oak to Barking Electrification Over Bridge 14 Deck Lift

Document Title F001 - Approval in Principle

Doc. Ref.: 129178-JMS-FO1-ECV-000003 - i - Issued: December 2016

Contents

PART 1. DETAILS ................................................................................................................... 1

1.1 Proposed works ............................................................................................................... 1

1.2 Assets affected (see Appendix A)...................................................................................... 8

PART 2. DESIGNER’S SUBMISSION ...................................................................................... 9

PART 3. PROJECT ENGINEER’S COMMENTS ....................................................................... 10

PART 4. ASSET MANAGER’S APPROVAL .............................................................................. 11

APPENDIX A. Assets Affected ............................................................................................... 1

APPENDIX B. Drawings ........................................................................................................ 1

APPENDIX C. Design Hazard Management Register ............................................................ 1

APPENDIX D. Interdisciplinary Check (IDC) Notes .............................................................. 1



Doc. Ref.: 129178-JMS-FO1-ECV-000003 - 1 - Issued: December 2016

NR/L2/CIV/003/F001: APPROVAL IN PRINCIPLE

Issue number 1.1 Page …1... of …13...

Issue date 2nd June 2012

PART 1. DETAILS

Project title Gospel Oak to Barking Electrification Overbridge 14 Deck Lift

Project Number 668401

PRS Reference Number TBC

Location Crouch Hill Station

ELR TAH1 Mileage 3 miles 1342 yards

OS grid reference TQ 305 875 Structure Number 14

1.1 Proposed works

1.1.1 Brief General Description

The existing structure is located adjacent to Crouch Hill Station and comprises 3 spans supported

on brick abutments and two brick piers. The bridge deck spanning both the up and down

Tottenham and Hampstead lines consists of twenty one number prestressed precast concrete T

beams with concrete infill. The beams are supported on concrete cill beams and elastomeric strip

bearings. The two back spans are both masonry arches of similar span and construction. The

bridge carries the A1201 road across the railway at a skew angle of approximately 15°. The Skew

span between abutments of the masonry arch spans is approximately 6360m. The track span has

a clear skew span between abutments of approximately 7500m.

Solid brick parapets 355mm thick are present to both masonry arch spans. The track span has

430mm thick reinforced concrete parapets with brick outer faces.

As part of the Gospel Oak to Barking Electrification (GOBE) scheme, overbridge 14 has been

identified as having insufficient vertical clearance to accommodate the proposed OLE installation.

The existing headroom is approximately 4440m and the proposed minimum vertical clearance is

4740mm. The additional headroom will be provided by lifting the existing bridge deck 300mm

above its present position.







The piers and cill beams are to be retained to form part of the permanent works. The cill beams

are to remain in their current position. To accommodate the increase in height of the deck the

lifted deck is to be supported on steel hollow sections filled with grout. The void below the deck

and the cill beam will be infilled with insitu reinforced concrete to support the road and fill behind

the abutment. Stainless steel dowel bars will be drilled into the cill beam and cast into the infill

concrete. The steel hollow sections will be tied into the infill concrete via shear connectors to

prevent any movement after installation.

Temporary works will be necessary to support the deck from track level (if the deck is to be lifted

from track level).It may also be necessary to prop both piers during the deck lift to avoid any

instability of piers. All temporary works where necessary will be subject to separate formal F001,

F002 and F003 submissions.

To aid the deck lift masonry repairs to the masonry arch spans and concrete repairs to the track

span deck are to be carried out. Repairs will be in accordance with Network Rail standard

masonry repair drawings.

The two arch masonry spans are to be stripped down to the top of the existing backing and back

filled with light weight concrete to below road surfacing level.

Two additional steps are to be added to the stairs located on the north elevation giving access to

the down platform. The steps will be added to the top flight and will have similar dimensions as

the existing.

1.1.2 Details of any assumptions made in developing the proposals regarding any existing

structures, earthworks or permanent way

The local authority will be in agreement with the road lift to accommodate the increased

height of the deck.

Third party land owners/property owners will be in agreement with the road lift and any

necessary works to their property to accommodate the lift.

Utility company services through the bridge deck can accommodate the bridge deck lift and

the Utility companies are in agreement with the lift.

The S and T cable route attached to the north elevation of the bridge deck can

accommodate the lift. Survey of the cables and the support system to be carried out.

Lifting to be carried out from track level and the piers are to be propped







All necessary masonry repairs are to be carried out to the piers to enable the lifting works.

Stairs to platform assumed to be in good condition and able to be reused.

Parapets to be retained and increased in height only where necessary.

No inspection of both piers has been carried out of their inside faces or to the soffits of the

masonry arches. It is assumed that the inside faces are in good condition and require no

remedial works prior to lifting.

Existing waterproofing to remain with only renewal of the joints

Vehicle incursion containment levels are to remain as the existing provision across the bridge

and on the approach to both sides of the bridge.

1.1.3 Number and layout of tracks

Two tracks of the TAH1 line pass under Overbridge 14. The line speed is stated in Table 1 below.

At F001 stage it is proposed that the layout, level and position of the track are to remain as per

existing.

Line Current Line speedDown Tottenham and Hampstead 30

Up Tottenham and Hampstead 30 Table 1 - Schedule of Line Speeds

1.1.4 Foundation and substructure

The existing foundations and substructure comprise of brick abutments and brick piers. The track

span is supported off each pier via reinforced concrete cill beams. The existing cill beams and

piers are to remain and are to be repaired where necessary prior to the lifting works commencing.

It is not envisaged the increase of loads due to the lifting works will be greater than 10% of the

existing loads.







1.1.5 Superstructure

The bridge comprises of 3 number spans. Two spans are of masonry arch construction with the

arch barrel comprising of 4 rings of brickwork. Both spans are of similar geometry and both have

brickwork parapets. It is assumed that both arch barrels have flat concrete backing up to 100mm

below their arch crowns. The remaining span consists of 21 number precast prestressed T beams

with infill concrete between each beam. The beams are supported off cill beams via elastomeric

strip bearings. The cill beams are supported on brick piers. This span supports the road over the

two tracks of the Tottenham and Hampstead line. Reinforced concrete parapets with brick outer

faces are provided across this span.

All 3 number spans are to remain unchanged with only masonry or concrete repairs carried out.

All repair work will be carried out in accordance with Network Rail standard masonry repair

drawings.

The track span will be lifted by 300mm to accommodate the electrification of the tracks. The deck

once lifted will be supported off a 250 x 250 x 16 thick square hollow section filled with grout. The

hollow section will sit onto the existing cill beam and will have an elastomeric strip bearing fixed to

the top surface to support the bridge deck. The proposed bearing will be located on the centre

line of the existing bearings. Following installation of the hollow section the void below the deck

and the cill beam will be infilled with insitu reinforced concrete to support the road and fill behind

the abutment. Stainless steel dowel bars will be drilled into the cill beam and cast into the infill

concrete. The steel hollow sections will be tied into the infill concrete via shear connectors to

prevent any movement after installation.

1.1.6 Span / bearing / articulation arrangements for bridges

The superstructure is to be supported on elastomeric strip bearings. The bearings will be similar in

properties to the existing.

Each span dimension will remain unchanged.

1.1.7 Impact on the Surrounding Area

The lift of the road will affect adjacent properties and land. Access to and from adjacent

properties will also be affected.

Existing manholes, road gullies and chamber covers will be required to be lifted as will some

lighting columns.

The loop detectors and associated equipment will need to be replaced and the equipment lifted.







Road markings will need to be reinstated.

1.1.8 Drainage

Drainage of the road will remain as the existing via gullies located on the north side of the road

and either side of the bridge. There are no road gullies located on the bridge. The nearest road

gully to the bridge is located 20m away towards the west of the bridge adjacent the loop

detectors. A road gully is also located towards the east of the bridge approximately 30m away.

The drainage slot provided in each cill beam to the rear of the bearing will be infilled with

concrete as part of the permanent works.

There is also a drainage pipe to the rear of both cill beams approximately 1100mm below road

level. This will be removed to accommodate the proposed light weight concrete infill to be

installed above the backing of both masonry arch spans.

1.1.9 Headroom / lateral clearances

Lateral clearance will be unchanged. The vertical height to the soffit of the bridge deck will be

increased by 300mm.

1.1.10 Effect on sighting distances

There will be no effect on sighting distances caused by the works.

1.1.11 Principal materials to be used

Grade C40/50 concrete.

Light weight concrete

Structural steel

B500B reinforcement bars

Elastomeric bearings

Asphalt

Concrete kerbs

1.1.12 Special finishes

None

1.1.13 Use of pre-designed elements

None







1.1.14 Special access /inspection/maintenance arrangements

None

1.1.15 Significant interface with other Network Rail engineering disciplines

Interface with signalling and telecoms will be required as a cable route currently runs across the

north face of the bridge. Loose laid cables are also present adjacent the east pier within the cess

passing under the bridge. Temporary protection/support of the cables/troughing will be required

during the construction works. A cable survey will be required to ensure the cables and the cable

support system can accommodate the bridge deck lift.

Interface with Permanent Way will be required if lifting of the deck is carried out from track level

to ensure adequate protection to the tracks and the track drainage.

1.1.16 Significant interface with external organisations

Local Authorities

Third party land owners/property owners

Utility Companies

1.1.17 Services

There is a troughing route/cable route through the bridge attached to the east abutment.

Cable route with steel trunking attached to the deck of the north elevation of the bridge.

Track drainage/sewer passing through the bridge located between both tracks.

Gas mains, Water main, electricity cables, Telecomm cables and fibre optics all pass through the

deck of the bridge at road level.

1.1.18 Method of Construction Envisaged

During ROR Possession - Masonry Repairs

1. Set up site compound

2. Protect and support cables and troughing routes where necessary.

3. Under Temporary works F002/F003 (if necessary) set site access to bridge piers and

soffits

4. Carry out masonry repairs and concrete repairs to Network Rail standard repair drawings

and the design.

5. On completion of the repair works dismantle access scaffolding and tidy site.







During non ROR Possession - Bridge lift

1. Set up site compound

2. Protect and support cables and troughing route attached to the north elevation of bridge.

Cables attached to the east pier to be protected and supported.

3. Protect track drainage and tracks below bridge span to be lifted

4. Undertake Temporary works F002/F003 install temporary works for bridge lift. Temporary

works to include horizontal propping of both piers.

5. Remove road surfacing to all 3 spans. Excavate down to backing levels on both masonry

arch spans and to the rear of the deck.

6. Divert, protect and support utility company services passing through the bridge deck.

7. Remove end blocks to the rear of both deck ends. Clean out all joints between parapets

and inspect between backing and deck ends to ensure bridge deck can be lifted without

restrictions.

8. Install jacks, lift bridge deck and install steel hollow sections to each pier with elastomeric

strip bearing in place.

9. Inject hollow sections with grout and allow grout to set.

10. Lower bridge deck until supported onto new bearings and remove jacks.

11. Remove temporary works for lifting and propping.

12. Install compressible material to underside deck and to the deck ends. Place reinforcement

to void below deck and to deck ends.

13. Install shuttering/formwork and place concrete.

14. Remove shuttering and place concrete infill to the masonry arch spans.

15. Resurface bridge decks, install road markings.

16. Tidy site

1.1.19 Environmental constraints

Prior to any vegetation removal the appropriate environmental and ecological surveys must be

undertaken and the recommendations adhered to.







1.2 Assets affected (see Appendix A)







PART 2. DESIGNER’S SUBMISSION

I confirm that the criteria specified in NR/L2/CIV/003 have been considered, and that the

Design is submitted for Approval in Principle on behalf Amey OWR Ltd (IDH, 5th Floor, Colmore

Plaza, 20 Colmore Circus, Birmingham, B4 6AT).

Signed:

Title:

Principal Engineer

Name (print):

Jeffrey Smith

Date: 29-11-16

To be signed by the Contractor’s Responsible Engineer.







PART 3. PROJECT ENGINEER’S COMMENTS

I have considered this submission for Approval in Principle and I am satisfied that this has

adequately addressed the criteria specified in NR/L2/CIV/003, and confirm that the Design of

the Permanent Works is to be checked in accordance with the Design Check Categories listed in

Appendix A of NR/L2/CIV/003.

My comments on the submission are given below. Provided that these comments are addressed,

I hereby give Approval in Principle to the proposals.

Signed:

Title:

Name (print):

Date:

To be signed by the Project Engineer (Building and Civil Engineering).

Signed:

Title:

Name (print):

Date:

To be signed by other responsible person, such as the Project Engineer (Building Services).







PART 4. ASSET MANAGER’S APPROVAL

I have considered the submission and confirm that this is approved subject to the comments

given below being addressed within the Detailed Design.

Signed:

Title:

Name (print):

Date:

To be signed by the Asset Manager (Structures).

Signed:

Title:

Name (print):

Date:

To be signed by the Asset Manager (Geotechnical).

Signed:

Title:

Name (print):

Date:

To be signed by the Asset Manager (Buildings).

Project Name Wolverhampton Station Platform 3 Extension


Doc. Ref.: CO00664899-CIV-LEC2-9-F001 Rev.A02 - A1 - Issued: December 2016




APPENDIX A. Assets Affected

A.1 List of Buildings and Civil Engineering assets affected by the proposal

Asset No 1

Description Overbridge No 14

Location Crouch Hill Station

ELR TAH1/14 Mileage 3 miles 1342yds

OS grid reference TQ 305 875 Structure Number 14

A.1.1 Drawings of proposals

Drawing Reference Rev Title

129178-JMS-DRG-ECV-600582 B01 Existing General Arrangement - Sheet 1 of 4




129178-JMS-DRG-ECV-600586 B01 Defect Drawings – Sheet 1of 2


129178-JMS-DRG-ECV-600588 B01 Defect Schedule

129178-JMS-DRG-ECV-600589 B01 Proposed Plan

129178-JMS-DRG-ECV-600590 B01 Proposed Sections – Sheet 1 of 2


A.1.2 DESIGN CRITERIA

No increase in the live loading is anticipated.

A small increase in dead load due to the road lift is expected but this is not anticipated to be

greater than 10% of the original dead loads

Design Life

120 year design life and maintenance free for the first 25 years.

A.1.3 ANTICIPATED DEVIATIONS FROM STANDARDS (with justification)

None

A.1.4 GEOTECHNICAL CONSIDERATIONS

No geotechnical investigations have been undertaken for the permanent works. Any increase in

the loading is not anticipated to exceed 10% of the original loads.

Project Name Wolverhampton Station Platform 3 Extension


Doc. Ref.: CO00664899-CIV-LEC2-9-F001 Rev.A02 - A2 - Issued: December 2016




A.1.5 ACCOMPANYING DRAWINGS AND OTHER DOCUMENTS

A list of the accompanying drawings can be found in A1.1.1

A.1.6 OTHER RELEVANT INFORMATION

Details of existing parts/elements of structures/services to be retained and

incorporated into the Design

All existing elements of the bridge are to be retained within the design.

Unusual features

None

Novel or unusual use of materials and/or structural components

None.

A.1.7 SPECIAL ACCESS ARRANGEMENTS/REQUIREMENTS FOR EXAMINATION, INSPECTION,

REPAIR, RENEWAL OR REMOVAL

None

A.1.8 CHECKING CATEGORY

The Design of the Permanent Works is to be checked in accordance with

Category II of NR/L2/CIV/003

Project Name Gospel Oak to Barking Electrification – OB14 Deck Lift


Doc. Ref.: CO00664899-CIV-LEC2-9-F001 Rev.A02 - B1 - Issued: December 2016

APPENDIX B. Drawings

Drawing Reference Rev Title







129178-JMS-DRG-ECV-600588 B01 Defect Schedule

129178-JMS-DRG-ECV-600589 B01 Proposed Plan





Doc. Ref.: CO00664899-CIV-LEC2-9-F001 Rev.A02 - C1 - Issued: December 2016

APPENDIX C. Design Hazard Management Register

Design Hazard Management RegisterProject Number CO00668401Project Name Gospel Oak to Barking Electrification – OB14 Bridge liftDoc. Ref CO00668402-OB14-CIV-DHMR-004

Rev: 2 Date: Apr 15 Ref: HS-CDM-FO-11 Page 1 of 4

© Amey plc UNCONTROLLED IF COPIED OR PRINTED

Name Signature DatePrepared by Richard BodenhamChecked by Jeffrey Smith

Approved by Jeffrey Smith

Work Stage 1 Construction Responsibilities and Actions

Ref Element /Activity HazardPersonsat Risk 2

Design Team Action taken toeliminate or reduce thehazard 3

By who Target DateFurther actions orInformation necessaryto manage residual risks

Status4

Buried Servicespassing through

Bridge Deck

Damage to utility servicesincluding Gas, water and

electricity. Injury toconstruction workers

(1,2)

Slit trenches have been dug at bothends of the track span bridge toidentify services across the full widthof the bridge.All known services passing through thedeck identified by the slip trenches andburied service information marked oncontract drawings.

Contractor Construction

Further liaison with individualUtility companies to advise ontheir requirements for liftingthe deck.

Residual

Solutions Considered Not Reasonably Practicable Presumed Construction Methods

None Presumed construction method is to be stated on design drawings.

Services attachedto the north

elevation (Stationside) of the bridge

Electrocution and damageto Network Railinfrastructure

(1, 3, 4) Hazard identified on design drawings Contractor Construction

Cable surveys and inspectionof support system to ensurethe cables and supports canaccommodate the deck lift.

Cables/trunking to beprotected and supportedduring the lifting works.

Residual


NonePresumed construction method is to be stated on design drawings.








Status4

Existing serviceslaid adjacent to

the east pierwithin the cess

Electrocution and damageto Network Railinfrastructure

(1) Hazard identified on design drawings Contractor ConstructionCables/trunking to beprotected and supportedduring the lifting works.

Residual



Trackdrainage/sewer

Damage to pipe andpossible instability of anyadjacent temporary works

(1,2) Hazard identified on design drawings Contractor Construction Pipe to be protected duringthe works Residual



Live loading tobridge spans

duringconstruction

works

Instability of the piersduring lifting of the deck.

(1)

Liaison with liftingcontractor/contractor to determineextent of any live loading necessaryon the bridge decks during lifting.

Analysis to be carried out todetermine stability of the structure.


Equipment/live loading to berestricted on the bridge decksunless analysis is carried outto ascertain live loadcapability.

Residual


NonePresumed construction method is to be stated on design drawings.

For the moment it is assumed that the piers will be propped off each otherhorizontally as part of the track-based temporary works for the lifting.

Position of liftingpoints for deck lift

Damage to deck beamsand potential for collapse

(1)

Liaison with liftingcontractor/contractor to determinelifting positions and analysis to be

carried out to confirm their suitability.

Contractor ConstructionLifting position for deck beamsto be as close to the face ofthe piers as feasible.

Residual










Status4

Condition of piers

Instability and collapse ofthe piers during lifting

works.

(1)

Masonry repairs specified on contractdrawings to be carried out prior tolifting works.

Intrusive testing works to be carriedout to confirm the condition andconstruction of the piers.


Both piers to be cored toconfirm condition of thebrickwork and its construction.Any necessary repair to becarried out prior to lifting workcommencing.

Residual



Condition ofbacking and

extent

Instability and collapse ofthe piers during lifting

works.

(1)

Intrusive testing works to be carriedout to confirm condition andconstruction of the piers.

Analysis to be carried out to confirmthe stability of the piers followingcoring of the arch barrels.


Both arch barrels to be coredcarefully to confirm conditionand extent of the backing priorto lifting works commencing

Residual



Prestressedbeams

Damage and reducedcapacity due to fixing into

prestress beams

(1) Hazard identified on design drawings Contractor ConstructionContractor not to drill intoprestressed beams under anycircumstances.

Residual










Status4

Condition ofmasonry arches

Unknown condition ofarches. (Arches not

inspected at the time ofthe last Detailed exam)

(1) Hazard identified on design drawings. Contractor Construction

Arches to be cleared of alldebris and inspected.Any necessary repair workidentified to be carried outprior to the lifting workscommencing.

Residual



Debris withinarches

Potential for unknown,hazardous materials (1)

Hazard identified on designdocuments. Contractor Construction

Survey to be undertaken byspecialist contractor(s). Residual

1. Work Stage: Choose from the drop-down box on page 1 as applicable. Use a separate page for each Work Stage.2. Persons at Risk: (1) Construction workers (2) Members of the Public (3) Maintenance workers (4) Demolition workers3. Design Team Action taken to eliminate or reduce the hazard. State where the information on the measures taken to reduce the hazard is contained (i.e. PCI, Specification, etc.). Where

no measures have been taken, state “None”4. Status Open, Closed or Residual



Doc. Ref.: CO00664899-CIV-LEC2-9-F001 Rev.A01 - D1 - Issued: December 2016

APPENDIX D. Interdisciplinary Check (IDC) Notes

f001 - approval in principle · at f001 stage it is proposed that the layout, level and position of...

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