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  Metro Kuala Lumpur – The Chemical Contribution

  Malaysia’s first Mass Rapid Transit (MRT) project was officially launched on July 8 2011. The total length of 51km stretches across Klang Valley, 9.5km running underground with 7 stations across the busiest city center of Kuala Lumpur. MRT is expected to be in operation by end of 2016. The project was awarded to MMC Gamuda KVMRT (T) Sdn Bhd. The geological conditions of the Klang Valley makes tunnelling beneath Kuala Lumpur extremely challenging - cutting through 2 totally different geological formations: The Kenny Hill Formation (consisting of metamorphosed sedimentary rocks) and the Kuala Lumpur Limestone Formation (with highly developed, erratic karst features). The project was divided therefore into 4 launching shafts with 2 totally different TBM types for each geological formation: EPB TBMs for the Kenny Hill Formation and Variable Density (VD) TBMs for the Limestone Formation. This paper gives an overview about the experiences of the use of soil conditioners on the EPB TBMs drilling through the Kenny Hill Formation, the tail sealants used, the determination of the best annulus grout formulation as well as the leak sealing repairs of the concrete lining.

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