This is especially true for MMC Gamuda Joint Venture , the main contractor for the underground portion of the Klang Valley MRT project’s second line.
“Other than the more complex geology, the Putrajaya Line tunnels also traverses close to critical infrastructures, such as KTM rail lines, the Express Rail Link, the Stormwater Management and Road Tunnel , the Kelana Jaya Line LRT tunnels, as well as the Kajang Line tunnels. “Here, our customised Variable Density TBMs that were refined after lessons learnt from building the Kajang Line allowed us to re-sequence some TBM drives to mitigate against delays.
“If the underground work portion was awarded in piecemeal instead of a single package, it would have been impractical to extend the TBM drive due to potential clashes and contractual complications, ” said Chin.It won the NCE’s Technical Innovation of the Year Award for its Variable Density TBM in 2014, which was developed specifically for Kuala Lumpur’s notoriously difficult karstic limestone.
The second was the Innovation in Tunnel Excavation Award at the Tunnelling Festival Awards in the UK sponsored by the British Tunnelling Society. “S-777 was also one of the TBMs from the Kajang Line refurbished locally through careful storage and maintenance at our refurbishment facility in anticipation of upcoming tunnelling projects, ” said Chin.
MMCGAMUDAMRT Determination to create a white elephant
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