The Lexi Expressway Daliangshan No. 1 tunnel constructed by the China Railway 18th Bureau has set several national road records: "Yuecheng Liangshan" has created a national record of 32 meters of road tunnel TBM excavation in a single day; "Yuecheng" "Liangshan" began to enter the tunnel in October 2020. As of August 4, 2021, it took just 9 months to create the fastest record of 3,000 meters of road excavation in the country. From July 8th to August 8th, 2021, the "Yuecheng Liangshan" digging up to 601.12 meters alone!
In a blink of an eye, from August 11 to September 11, 2021, Yuecheng Liangshan broke its original record and once again created two new national records: the national record of 40.1 meters in a single day; (see Digging) Record sheet); a national record of 723.82 meters of excavation in a single month.
The surrounding rock of the flat pilot tunnel of Daliangshan No. 1 Tunnel is mainly sandstone and silty mudstone. The overall self-stability is relatively good, and there are local fragments, small collapses, and dripping water. To ensure the safety of the "Yuecheng Liangshan" TBM For rapid excavation, Sichuan Road Group Chuan Gao Lexi Company formulated a special construction plan. Therefore, the "Yuecheng Liangshan" of the China Railway 18th Bureau can continuously set the two national records for the single-head excavation of expressway tunnels, which is inseparable from the strong support of the Sichuan Road Group Chuan Gao Lexi Company.
The daily record of footage has changed from 32 meters to 40.1 meters, and the monthly record of footage has changed from 601.12 to 723.82 meters. The "Yuecheng Liangshan" of the China Railway Eighteenth Bureau is not only challenging the hard rock, but also breaking the limit and surpassing itself. The birth of these two new records has further consolidated China Railway 18th Bureau's king status in the TBM field! Editor/Sang Xiaomei
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