Client
Land Transport Authority
Project Completion
Jun 2011
LTA ER233 – Upgrading of West Coast Highway
To improve the traffic flow, a two-lane dual-carriageway vehicular flyover was constructed across the junction of West Coast Highway and Clementi Road. Four precast U-girders, 35 m in length by 2 m in width by 2 m in depth each, were launched for the span across the junction. The entire flyover is sitting on fifty bored piles, ranging from 0.9 m to 1.5 m in diameter.
Besides, two pedestrian overhead bridges (POB) with barrier-free ramps were erected across West Coast Highway. For each POB, one prestressed precast (PSPC) beam with a dimension of 40 m in length by 2.4 m in width by 1.6 m in depth was launched.
Further down at the intersection between West Coast Highway and Jalan Buroh, the existing heavy-traffic roundabout was reconstructed. Semi-rigid pavement system was adopted to improve the durability of carriageway and to reduce the turnaround time for lane closure so as to minimize disruptions to road users.
Special Feature
- The spanning distance of the heavily-loaded vehicular flyover across the junction is 70 m as compared to the typical distance of 40 m.
- Special grouting technique was deployed to fill up the cavities between the bored piles and geological strata, comprising limestone.
Bored piling works for the construction of flyover across the junction of West Coast Highway and Clementi Road
Construction of flyover crosshead with post-tensioning upon the completion of bored piles, pile caps and pier column
Construction of flyover cantilever box girder with post-tensioning for the launching of precast U-girders
Construction of flyover box girder deck slab spanning between two crossheads
Launching of PSPC beam for the construction of POB across West Coast Highway
