Downtown MRT line Project, Stage 2

Rochor and Little India MRT Station Contract 921 (LTA Contract 9161F)

Rochor station was first announced as part of Downtown Line Stage 2 (DTL2) in 2008. Contract 921 for the design and construction of Rochor station, Little India station and tunnels was awarded to SsangYong Engineering & Construction Co. Ltd. 

This contract was quite challenging as there were 10-lane roads, the Rochor Canal on the ground above, and the existing northeast line that was only 5 meters above the construction site. A 167 meters long box shaped tunnel structure had to be placed before a main construction even began. Every type of subway construction method, including NATM, TBM, and Open-Cut, had been used to construct this short stretch of extension, and the roads above had to be detoured more than 50 times to ensure that there was no inconvenience to the traffic.

Hundreds of Encardio-rite sensors were used in the project to monitor safety during construction works. The instrumentation included 260 piezometers, 790 arc weldable strain gauges, 25 tilt meters, and 12 crack meters. All sensors (100%) have operated satisfactorily.