某地铁隧道盾构机始发阶段地面塌陷原因分析

Cause Analysis on the Ground Collapses during the Launching Period of a Metro Shield

某地铁隧道在盾构机始发后的半个月内连续发生了三次地面塌陷。基于工程地质条件,结合地面监测资料和盾构机掘进时的运行状况,文章对这三次地面塌陷发生的原因进行了分析,并总结提出了盾构机始发过程中在各个方面应该注意的问题,以避免类似问题的发生。另外,文章也探讨了盾构法隧道施工工程地质问题与传统隧道施工工程地质问题发生机制的不同之处。

In a metro jobsite,there occurred three continuous ground collapses during the fifteen days after the launching of the shield.According to the site geological condition,ground subsidence monitoring data and the machine working state,reasons for these three ground collapses have been analyzed in this paper.In order to avoid the similar problem to occure again,experiences during the launching period of a shield are summarized in this paper.The geological problems occurred for the conventional tunneling method and that for shield tunneling method are different in mechanism,and the differences are discussed in this paper.