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  Longest Tunnel Construction in South-east Asia Utilizing

  The long-distance water transfer tunnel which links the state of Pahang and Selangor in Malaysia is completed and under operation. The tunnel length is 44.6 km with diameter of 5.2m and it is one of the largest infrastructure projects in Asia. The completed project relieves the shortage of water supply for daily life and industries of Kuala Lumpur and Selangor State (Supplying Approximately 1.89 million m3/ day) of 44.6km length, 3 sections comprising 34.6km excavated by Tunnel Boring Machine (TBM), 4 sections with length of 9.1km is by conventional tunneling. The challenges in long-distance tunneling (with TBM drives up to 11.6km length) in order to achieve high-speed progress several measures are taken these are function well and completed without major stoppages. The performance of TBM with these measures are found effective. These results and technologies will resolve the difficult problems during the construction of similar projects in the world.

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