Klang valley Mass Rapid Transit Project, Malaysia

This project is part of the Klang Valley Mass Transit Project – Jajaran Sungai Buloh-Kajang (SBK) UG1 & UG2 Line. The underground works consists of 9.5km of underground tunnels and seven underground stations. The bored tunnels extend between the North Portal at Semantan and the South Portal at Maluri. The stations are generally of island platform configuration and include new interchanges which link to existing or proposed railway and transit lines.

Our scope is to act as CICE to perform independent review, checking and certification of all the major temporary works design involving the entire length of tunnels and Underground Package UG2 (i.e. Plaza Rakyat Station, Cochrane Station, Maluri Station, Escape Shaft 3 and South Portal) for the safety and design adequacy.

The temporary work scope involves:

• Any excavation and lateral support to resist horizontal earth and water pressure arising from subsoil conditions.
• Foundations for heavy lifting cranes and support gantries.
• Temporary diversion schemes for existing watercourses affected by the temporary works, temporary road decking and temporary support of utilities.
• Tunnel segmental lining subjected to construction load and breaking out of tunnel lining to construct cross passage.
• Launch Shaft Elements – thrust frame / block /foundation for thrust frame.
• Face pressure / cutter-head intervention, cross passages and mined adits including temporary bracing support for bored tunnel.
• Impact assessment on the nearby structures due to the temporary works.