On June 21, the Xiaoxiangling Tunnel, the last tunnel of the Emei-Mianning section of the 21.775-kilometer-long Chengdu-Kunming Railway, was successfully completed.
Xiaoxiangling Tunnel is located in Yuexi County and Xide County, Liangshan Prefecture, Sichuan Province. It is located in the middle and high mountain area of Hengduan Mountain. It passes through 10 faults and 2 folds. The maximum buried depth is 1350 meters. Risk Tunnel.
In the process of construction, there are many geological difficulties such as water inrush, sand inrush, landslide, active fault, fault fracture zone, large deformation of soft rock, rock burst and high ground temperature, which bring great challenges to the construction and construction.
The Chengdu-Kunming Railway has been constructed and opened in sections. At present, only the section from Emei to Mianning is under construction. It is expected that the entire line will be completed by the end of 2022.
(Reporter Liu Zhongjun produced Chen Xuanbin)
Responsible editor: [Li Ji]