盾构隧道进出洞地基加固处理

Foundation reinforcement treatment of the shield tunnel entering and tunneling cave

通过对上海市某地铁盾构进洞中所遇到的问题和处理措施的研究,说明目前盾构进出洞中普遍存在的问题,并对相应的地基加固措施进行一定的比较和分析,指出了进洞土体为砂土时应注意的问题及相应的补救措施,并进一步提出了采用高压旋喷作为地基加固手段的缺陷。

According to the researches on existing problem and treatment measures in one railway shield entering cave in Shanghai city, the author describes the common existing pmblems of current shield entering and tunneling cave, and gets certain comparison and analysis on corre-sponding foundation reinforcement measures, points out the attention problems and corresponding remedial measures when the entering cave soil is sand, and further provides disadvantages of the foundation reinforcement way adopting high pressure jet grouting.