Forth Replacement Crossing: Main Crossing (Bridge) Scheme Assessment Report Development of Options

Report on Scheme Development
January to August 2008

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Bibliography and Workstream Timeline

1 Introduction
1.1 FRCS Reference Design
1.2 Development of Scheme Options

2 Description of Scheme Options
2.1 Functional Cross Section
2.2 General Arrangements
2.3 Deck Type
2.4 Tower Forms
2.5 Approach Bridge Type
2.6 Foundations

3 Key Issues and Assumptions
3.1 Key Issues
3.2 Consideration of longer main spans
3.3 Stay Cables
3.4 Ship Impact
3.5 Other Issues

4 Assessment of Functional Cross Section Options
4.1 General considerations
4.2 Assessment of options
4.3 Three Corridor Option Connectivity
4.4 Double Level Option Connectivity
4.5 Comparison

5 Assessment of Deck Type Options
5.1 Three corridor options
5.2 Double deck options

6 Assessment of Tower Options
6.1 General
6.2 Three Corridor Options
6.3 Double Level Options
6.4 Assessment of Options

7 Assessment of Options for Approach Spans
7.1 Three Corridor Deck Options
7.2 Double Level Deck Options
7.3 Pier Forms

8 Assessment of Foundation Options
8.1 Site Conditions
8.2 Foundation Options
8.3 Central Tower Foundations
8.4 Flanking Tower Foundations
8.5 Side Span Foundations
8.6 Approach Span Foundations

9 Options for Construction Methods
9.1 Cable Stayed Spans
9.2 Approach Viaducts
9.3 Foundations
9.4 Construction Programme

10 Durability, Inspection and Maintenance
10.1 Durability
10.2 Inspection & Maintenance

11 Preliminary Consideration of Assessment of Anticipated Departures From Standard
11.1 Functional Cross Section
11.2 Post-tensioned grouted ducts

12 Conclusions and Recommendations
12.1 Cost Comparison
12.2 Sustainability Comparison
12.3 Recommended Options for Further Development

Appendix A - Reference Design Drawings
Appendix B - Main Crossing Scheme Assessment Drawings
Appendix C - Main Crossing Scheme Assessment Architectural Figures
Appendix D - Central Tower Stability
Appendix E - Schematic Multi-Modal Alignments
Appendix F - Main Crossing Construction Programmes

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Published Date 14 Apr 2009 Type Projects