Forth Replacement Crossing: Main Crossing (Bridge) Scheme Assessment Report Development of D2M Alternatives
Report on Scheme Development
October to November 2008
Contents
Bibliography and Workstream Timeline
1 Introduction
1.1 Background to D2M Option
1.2 Multi-Modal Base Case
1.3 Dual 2 Lane Configurations Studied
1.4 Development of Scheme Options
2 Description of D2M Options
2.1 General Arrangement
2.2 Functional Cross Section
2.3 Deck Type
2.4 Tower Forms
2.5 Approach Bridge Type
2.6 Foundations
3 Key Issues and Assumptions
3.1 Crossing Stays
3.2 Consideration of longer main spans
3.3 Live Load
3.4 Ship Impact
3.5 Other Issues
4 Assessment of Functional Cross Section Options
4.1 General
4.2 Alternative Functional Cross Section Arrangements
4.3 Assessment of options
5 Assessment of Deck Type Options
5.1 Single Box Girder
5.2 Twin Box Girder
5.3 Ladder Beam
6 Assessment of Tower Options
6.1 General
6.2 Mono-Tower
6.3 H-Shape Tower
6.4 Diamond Tower
6.5 A-Shape Tower
6.6 Assessment of Options
7 Assessment of Options for Approach Spans
7.1 Deck
7.2 Piers
7.3 Assessment of Options
7.4 Conclusion
8 Construction Methods and Programme
8.1 Construction Methods
8.2 Construction Programme
9 Durability, Inspection and Maintenance
9.1 Durability
9.2 Inspection & Maintenance
9.3 Lane closures for stay replacement
9.4 WASHMS
10 Preliminary Consideration of Anticipated Departures From Standard
10.1 Use of Eurocodes
10.2 Post-tensioned grouted ducts
10.3 Orthotropic deck stiffness
10.4 Ship Impact
11 Conclusions and Recommendations
11.1 Assessment of Scheme Options
11.2 Recommended Options for Further Development
Appendix A - Multi-Modal Base Case Drawings
Appendix B - D2M Feasibility Studies
Appendix C - Architectural Figures
Appendix D - D2M Scheme Assessment Drawings
Appendix E - Construction Programmes
No part of this report may be copied or reproduced by any means without prior written permission from Jacobs Arup – Jacobs UK Limited and Ove Arup & Partners International Limited Consortium. If you have received this report in error, please destroy all copies in your possession or control and notify Jacobs Arup.
This report has been prepared for the exclusive use of the commissioning party and unless otherwise agreed in writing by Jacobs Arup, no other party may use, make use of or rely on the contents of this report. No liability is accepted by Jacobs Arup for any use of this report, other than for the purposes for which it was originally prepared and provided.
Opinions and information provided in the report are on the basis of Jacobs Arup using due skill, care and diligence in the preparation of the same and no warranty is provided as to their accuracy.
It should be noted and it is expressly stated that no independent verification of any of the documents or information supplied to Jacobs Arup has been made.