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Groove Stability of Diaphragm Wall Excavation in Micro-confined Water Stratum
Author(s): 
Pages: 20-24,28
Year: Issue:  6
Journal: Urban Mass Transit

Keyword:  地下连续墙槽壁稳定微承压水旋喷桩加固;
Abstract: 以苏州火车站综合改造工程中连续墙成槽施工为背景,结合一典型事故案例,通过现场施工、检测及计算分析,从地层条件、施工参数等方面探讨了微承压水地层中超深基坑地下连续墙的成槽稳定性问题.研究表明:微承压水地层是连续墙成槽塌孔的重要因素.抓斗施工时频繁抓土与上提,使其下方一定范围的泥浆受到负压影响而减弱护壁作用.地面超载较小时,槽壁最大变形与荷载增量成小幅线性增长,但较大超载可使土体剪切破坏、槽壁坍塌.提...
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