上村隧道不良地质地段沉降控制措施

Control Measures for Ground Subsidence in Poor Geological Section of Shangcun Tunnel

云桂铁路上村隧道出口工区的浅埋、顺层偏压段施工过程中,由于处置不当,发生了沉降超限的事故。本文将事故发生的情况、发生的原因、处理方法以及其后面紧接着的顺层偏压段正确施工方法加以介绍。

In the process of shallow buried construction of unevenly-pressured section embedded in layered rock mass in the exit of Shangcun Tunnel in Yungui Railway（from Nanning to Kunming）, an accident of over-loading and subsidence happened due to an improper handling. This paper introduces the process, reasons, countermeasures of this accident, and a correct construction method for the unevenly-pressured section embedded in layered rock mass.