微承压水地层超深地下连续墙成槽稳定性分析

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...

Groove Stability of Diaphragm Wall Excavation in Micro-confined Water Stratum

Based on the construction background of diaphragm wall groove of the renovation project at Suzhou Railway Station.and combined with a typical case of accident, also through construction practice,detection and simulation, the groove stability of diaphragm wall in micro-confined water stratum is studied from aspects of construction parameters and geological conditions.This study shows that,the micro-confined water stratum is an important factor in the collapse of slurry trench;the negative pressure in mud ind...