Project Name：Leshan-Xichang Expressway Project K2 Section

Project Unit：China Railway 18th Bureau Group Tunnel Engineering Co., Ltd

Project Description：The Leshan–Xichang Expressway K2 Project, undertaken by China Railway 18th Bureau Group, focuses on the construction of the exit section of the Daliangshan No. 1 Tunnel. The tunnel has a total length of 15.3 km, with a TBM excavation length of 10.68 km and a cutting diameter of 7.93 meters.

Project Equipment："Yuecheng Liangshan" TBM

Supply Time: 2020.11.25-2022.11.25

Geological Condition：TBM passes through plagioclase granite (with a uniaxial compressive strength of 120-150 MPa and a quartz content of 30%), fault fracture zones, and areas of high water inflow

Cutter Solution：Customized designs match Daliangshan's extreme geological conditions, conducting joint technical efforts to overcome construction bottlenecks, ensuring on-site reliability to reduce downtime, and contributing to industry-wide technological advancement.

Located deep in the Daliangshan Mountains with difficult logistics and tight construction windows, the company established a "resident service + regional emergency" dual support system, focusing on rapid response and efficient problem-solving to ensure continuous TBM tunneling.

Project Results：These innovations directly enabled the "Yuecheng Liangshan" TBM to set industry records of 49.12 meters of daily advance and 730.2 meters of monthly advance.