Klang Valley MRT

Sungai Buloh-Kajang Line Underground Works Package

Presented by Mr Satpal S. Bhogal

Project Director - MMC GAMUDA KVRMT (T) SDN BHD

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Key Stakeholders Project Owner:

Mass Rapid Transit Corporation SDN BHD (Government of Malaysia) Engineering Firms:

Mott MacDonald, AECOM Sub-Contractors:

Herrenknecth AG, Bauer, CEC International Malaysia, China Railway Engineering Equipment Group of Company, Nanyang Tunnel Engineering, OTA Sdn Bhd, Protext Sdn Bhd.

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How ITA Criteria were addressed in the Entry Submission: The success of bringing the Project in on time and within budget is largely credited to the design and construction innovations developed for and during the project.

These include:

• Variable Density Tunnel Boring Machine

• Steel fibre Reinforced Concrete Segments and Universal Tunnel Lining Rings

• Station Depths Reduced with lifting Vertical Alignment

• Deep Soil Mixing

• Re-scheduling of TBM Drives during the Project cycle.

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Relevance of the Project and the Tunneling Solution • Geological Challenges

• 50% of the tunneling alignment sitting in highly graded Karstic Limestone

• Classified as extreme karst (5 on a scale of 1-5)

• Intricate three-dimensional network of solution channels, steep side crevices and highly irregular rock head

• Overlain with soft soils

• High groundwater table

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The Success Story The tunneling works were completed in April 2015 without any

major incidents of sinkhole or subsidence in the Karstic Limestone

The tunneling solution was a major factor in overcoming opposition to the selected alignment from highly influential affected stakeholders and allowing underground construction to proceed

MGKT employed 90% of all tunneling engineers locally and trained 50% of its operations crew from their own tunneling academy set up in December 2011

The VD-TBM has since won the International Tunneling award for Technical Innovation

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Project site comprised 2 equal route lengths of geological areas, Karstic Limestone & Kenny Hill. For Stations, open excavation with rock blasting in Limestone to construct bottom up and D-Walls with temporary columns to support top-down construction in Kenny Hill. For Tunnels, VD machines in Limestone and EPBs in Kenny Hill.

Variable Density Tunnel Boring Machine

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Tunnelling Training Academy [TTA]

Inaugrated in Dec 2010 by Dr Tun Mahathir

Training on full size TBM components

Local talents at Tunneling Training Academy (TTA)

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Completed tunnels being fitted out with track works and systemwide services

TRX Station (Interchange Station Lines 1&2)

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Open excavation in karstic limestone. Bottom-up construction.

Finished Station Perspective.

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Variable Density Tunnel Boring Machine was recognised for its innovation and performance at the 2014 ITA Awards.

International Safety Award

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THANK YOU

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