富水砂层中盾构端头加固体失效原因分析及防治

On analysis of reasons for solidifying agent failure at shield ends in water-rich sand

通过国内已建和在建地铁采用非冻结法在饱和砂层中进行盾构端头井加固施工失效而引发盾构始发或到达失败的案例,从设计和施工两个方面进行原因分析,提出了预防措施,对今后在类似地层中采用非冻结法进行加固施工一次成功,避免重复加固,减少浪费、节约成本、保证工期,有一定的借鉴和参考意义。

According to the shield starting position or arrival failure caused by the failure of the shield end consolidation construction by adopting the non-freezing method at the built and constructing subways in China, the paper analyzes the reasons from the design and the construction, points out the prevention measures, so as to provide some reference for the success of the non-freezing method in the consolidation construction and to avoid the repeated consolidation, reduce cost, and ensure the construction period.