Construction
The line will pass underneath Taiwan Railway and Taiwan High Speed Rail tunnels between Songjiang Nanjing and Zhongxiao Xinsheng. Construction involves the excavation and removal of a multi-retaining wall. The two transfer stations at Minquan West Road and Zhongxiao Xinsheng are being built as extensions beneath the present operational stations. The clearing of the shield tunneling section beneath the Tamsui River was successfully achieved on November 6, 2007.
Construction included a turnout and cut-and-cover tunnels beneath Daqiao Elementary School. However, since evacuation of these two segments reached 40 and 34 meters, respectively, high water pressure could affect construction safety. Thus, a ground-freezing method was employed to ensure construction safety.
The Xinzhuang will be the first line in Taiwan to adopt Floating Slab Track (FST) construction techniques to decrease noise and vibration when a train passes. It can decrease natural vibration frequency below 18 Hz and lower maximum noise volume to less than 35 decibels. On the Xinzhuang/Luzhou Lines, there are 18 sections totaling 4.476 km of track that utilize FST construction techniques.
Construction inspection for the line began in April 2011 for the section from Huilong to Taipei Bridge, as well as at Dongmen. The inspection included civil engineering, tracks, machinery, power/electricity, and station facilities.
Read more about this topic: Xinzhuang Line (Taipei Metro)
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