The face cut a rectangular TBM is in rectangular shape which enables best use of the face. Requiring shallow overburden and reduced construction costs, a rectangular TBM is mainly used for pedestrian passages, traffic tunnels, underground utilities, underground parking lot and underground reservoirs. Rectangular TBM is an efficient and convenient solution to urban traffic congestion.
Rectangular TBM has already been successfully used in China. On December 25th, 2015, the world largest face rectangular TBM by CREG (height 10.42m x width 7.55m) was rolled off assembly line in Dalian, China and deployed to bore the underpass tunnel across Heiniucheng Road in Tianjin Metro Lin 11 Project. Its size breaks the record set by a previous CREG-made 10.12 x 7.27m rectangular TBM which bored the underpass across Zhengzhou Zhongzhou Avenue in China.
On February 20th, 2016, a CREG-made rectangular TBM was successfully launched at Thomson- East Coast Line Project, Singapore. This TBM requires shallow overburden and low construction cost and enables maximum use of cut face. It is to bore a drive of 156mto connect the entrance and exit of HLV Station.