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KVMRT, SBK Line Underground Works
The year under review saw the official signing of the
underground works agreement for the KVMRT, SBK Line
on 8 February 2013. The underground works package
entails the design, construction and completion of
tunnels, stations and associated structures between the
Semantan Portal and Maluri Portal.
A significant milestone achieved in the underground
works is the inaugural launch of the world’s first VD TBM.
The VD TBM was co-designed and developed by MMC-
Gamuda JV in partnership with Herrenknecht AG, the
world’s largest tunnel boring manufacturer. The VD TBM is
specifically designed to minimise tunnelling risks posed
by Kuala Lumpur’s extreme karstic limestone geology.
Out of the 10 TBMs procured for the tunnelling works,
six of them are VD TBMs. The first of six VD TBMs to be
deployed arrived in Malaysia on 30 January 2013, after
having undergone a successful Factory Acceptance Test
(FAT) in Schwanau, Germany in November 2012.
Upon its arrival, the various components were moved
to the Cochrane Launch Shaft where the VD TBM
was successfully assembled, a process that took three
months and was completed in May 2013.
As of end-FY2013, tunnelling is proceeding well
at the Cochrane Launch Shaft and the Semantan
Portal, where two units of Variable Density Tunnel
Boring Machines (VD TBMs) and two units of Earth
Pressure Balance Tunnel Boring Machines (EPB TBMs)
are operating in 24-hour shifts, respectively.
At the same time, as of end-FY2013, all seven underground
MRT stations between the Semantan Portal and Maluri
Portal, namely KL Sentral, Pasar Seni, Merdeka, Bukit
Bintang, Pasar Rakyat, Cochrane and Maluri that form
the 9.5km underground tunnel alignment are advancing
swiftly with most works centering on diaphragm wall and
secant bored pile construction, excavation with multi-level
strutting and station floor slab concreting works.
Particularly, massive excavation took place at the Pasar
Rakyat MRT station, which will be among the deepest of
all underground MRT stations at 45m below ground level,
while diaphragm wall works, king post installation and
utilities relocation took centrestage at the Bukit Bintang
MRT station. At the Merdeka MRT station, the station box
was secured with multi-level strutting to ensure stability
of the station site.
As of end-September 2013, all 10 TBMs were already
delivered by the suppliers.
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Operations
Review
Gamuda Berhad (29579-T)
Annual Report 2013
Extensive strutting works were completed to support excavation works at Bukit
Bintang MRT station. With the floor mat for first panel of roof slab laid, next would
be rebar fixing, followed by scheduled casting.