SYNOPSIS
The MRT Sungai Buloh-Serdang-Putrajaya (SSP) Line is the second of the three planned Klang Valley Mass Rapid Transit (KVMRT) lines to be constructed at the Greater Kuala Lumpur. The approved alignment is 52.2km in length, of which 13.5km is underground primarily within downtown Kuala Lumpur. A total of 37 stations, 11 of which will be constructed underground. The proposed first section of the southern elevated alignment of KVMRT Line 2 - Southern Kuchai Lama Serdang Alignment (SKSA) interfaces with the underground alignment near the Taman Desa Water Theme Park at Kuchai Lama and ends at Universiti Putra Malaysia (UPM) after crossing Maju Expressway (MEX) where it connects to the Serdang to Putrajaya Alignment (SEPA).

At one part of the SKSA, which crosses under the existing Kuala Lumpur – Seremban Highway, a 5.8m wide, 5.45m high and 58m long twin tunnel system is being constructed to accommodate an underpass railway tracks. The twin tunnel will be constructed within a so-called pipe-roofing system. The pipe roofing system is selected to support the roof of the top heading around the tunnel soffit as well as tunnel sides. Micro-tunnel boring machine (MTBM) is used to form the initial pipe roofing prior to mining the underpass. Sprayed concrete lining is used with steel rib lagging and face bolting as temporary supports for primary lining during the tunnel excavation before installation of permanent cast in-situ concrete lining.

This technical visit is aimed to highlight the various aspects and features of the tunnelling works on site, in particular the on-going micro-tunnelling work for the pipe-roofing installation.

SAFETY REMINDER: Participants to be well equipped with their own safety equipment i.e. safety helmet, safety vest and safety boots/proper shoes in order to gain site access.


NOTE
• The visit is strictly limited to 30 participants registered on a first-come, first-served basis.
• Please observe the NO Photography Allowed policy at MRT construction sites.