Construction method:
Infill Span: precast segmental
Multi levels station: precast segmental and precast beam.
Year : 2014-2015

Singapore MRT Tuas West Extension Project involved the construction of a twin level interchange station EW30 and 6 Km of elevated twin viaducts connecting to the existing Boon Lay extension.

In 2013 NDF, SDI’s parent company, supplied two Overhead Launching Gantries for the project, one for the approach viaducts, one specially adapted for the station area. In 2014 Shanghai Tunnel awarded SDI a subcontract for assembly, relocation, operation (segment and beam erection), maintenance and dismantling of both Launching Gantries.

Commencing in January 2014, SDI mobilized a team over 40 staff and workers

for the project. SDI completed erection of over 200 spans and multiple relocations of the launching gantries within 18 months with no major incidents or reportable accidents.

OPERATION CHALLENGES:

• Launching Gantry must adapt to erect double deck and triple deck spans.
• Erection of double deck spans with different levels at station approaches.
• Construction above the PIE expressway, the highest section of MRT ever built in Singapore.
• Erection of segments, T-beams and I-beams on three levels in the station concourse area.
• Split level piers requiring additional temporary supports.
• Operation above and adjacent to heavily trafficked roads.
• 24 hours operation with two or three shift systems.