world’s first variable density tunnel boring machine boosts mrt progress in kl

by:Gewinn     2019-08-15
Kuala Lumpur: The world\'s first variable density tunnel boring machine (TBM)
Breakthrough at the bus rapid transit station in Basheng Valley (MRT)
The Pasar Rakyat station here has promoted the progress of the underground works of Sungai Buloh
Line Kajang to 50%.
The overall progress of Malaysia\'s largest infrastructure project to date has reached 33%, MRT Sdn Bhd acting chief executive Harris Fazla Hassan said at a briefing along Jalan Tun Razak and near the planned Tun Razak Exchange.
Construction of the entire tunnel length is expected to end in the medium term2015.
Haris declined to comment on MRT Line 2 and Line 3, which has not yet been approved by the cabinet.
He praised the progress of drilling between Cochrane and Pasar Rakyat stations, where no major sinkholes or blowout incidents occurred, compared with about 100 incidents that plagued the construction of smart tunnels.
The TBM, named Cochrane 2, completed its six-
Month, yesterday\'s 1 km journey from Cochrane to Pasar Rakyat marked the completion of the first double tunnel between the two stations.
At that time it was already crawling under the SMART Tunnel and Jalan Tun Razak.
51 km underground section of Sungai Buloh-
The Kajang Line extends 9.
Between the Semantan Portal of Jalan Duta and the Maluri Portal of Cheras, 5 km kilometers.
Says Harris.
Kajang line is scheduled to be completed by the end of the Year-2016 and mid-
The first and second phases were 2017, respectively. MMC-
Gamuda JV, the main contractor and project delivery partner for Metro Tunnel works, will employ a total of 10 TBMs.
There are currently 7 TBMs in operation, although Pasar Rakyat\'s TBM will be retired after a breakthrough yesterday.
The rest are in storage, waiting for the construction of the launch site.
A variable density rock concrete tunnel specially designed for the Basheng Valley MRT, designed to dig karstic limestone, which is more complex, because the cavity filled with water and the large void chamber that may cause the surface sinkhole appear more.
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