This 1450 m-long crossing of the Fraser River forms a vital and visually attractive link between Vancouver and Richmond. The main spans comprise variable-depth, post-tensioned concrete box girders constructed in segments by balanced cantilever erection. In the 1970s, Klohn Crippen Berger (KCB) provided complete engineering services for detailed design, construction monitoring and contract administration.
During 2004-2012, we worked with Associated Engineering in designing the comprehensive rehabilitation and seismic retrofit design for the structure. All of the geotechnical engineering, including site investigation, liquefaction assessment, ground deformation analysis and ground improvement design were performed by KCB. The ground improvement utilized vibro-replacement, compaction grouting and timber compaction piles.
KCB provided construction services for the pier column and foundations retrofits, and the installation of the longitudinal restrainers and all of the ground improvement works. We also undertook the analysis and detailed design of the approach pier columns and foundations, assessment of the structure for liquefaction induced differential ground movements, non-linear time history analysis and assessment of the main span foundations, and design of longitudinal restrainers.
- Post-tensioned segmental concrete box girder construction
- Seismic retrofit and rehabilitation design
- Construction services for pier columns and foundations, and longitudinal restrainers