Client: Supreme Court
Engineer: PWD Corporation
Main Contractor: Bachy Soletanche

Works
Diaphragm Wall: 10,000m2
Thickness: 1m
Max Depth: 35m
Project Duration: 6 months

Equipment
2 x KS3000

The diaphragm wall for the New Supreme Court was constructed between June 2000 and September 2000. In the centre of Singapore the diaphragm wall was an advanced works contract awarded directly to Bachy Soletanche by the Supreme Court of the Government of Singapore. The Client's Engineer PWD design for the basement enclosed the existing basement remaining from the demolition of Columbo Court, which previously occupied part of the site.

The site consisted of 10,000m2 of 1000mm thick diaphragm wall up to 35m deep. Two hydraulic grabs, KS 3000, were used to complete the excavation works well within programme. The ground conditions varied accross the site but were essentially fill and sand for the initial 5m overlaying 5m to 17m of soft marine clay and then dense old alluvium.

The 2 KS3000's are seen here working along Columbo Court. The near machine is the low headroom model with an additional jib section allowing it to operate in normal mode. The 2nd KS in the background is the classic machine.

Note that both machines are working on the temporary decking.

The particular problem on this site was the old basement structure left over after the demolition of Columbo Court. The slab at the ground floor level would not support the excavation and services cranes along with all the ancillary equipment. A temporary decking was required for the duration of the works. This was designed and constructed by Fuchi Engineering as a sub-contractor to BSS.