木寨岭隧道大坪有轨斜井施工大变形段分析及处理技术

Case Study on Control of Large Deformation of Daping Inclined Shaft of Muzhailing Tunnel

兰渝铁路木寨岭隧道大坪有轨斜井,穿越地质为炭质板岩和炭质页岩,且存在高地应力,由于主要受地质因素影响,施工中出现较大收敛变形,通过介绍兰渝铁路木寨岭隧道大坪有轨斜井施工遇到的炭质板岩高地应力段大变形的处理,简要分析变形的原因、变形段的施工原则及处理技术。

Daping inclined shaft of Muzhailing tunnel on Lanzhou-Chongqing railway passes through carbonaceous slate and carbonaceous shale ground with high ground stress. Due to the geological reasons, large convergence deformation occurs during the construction of the inclined shaft. The control of the large deformation occurring during the construction of Daping inclined shaft in carbonaceous slate ground is presented and the reasons for the deformation, the construction principles in the sections with large deformation and the deformation control technology are analyzed in the paper.