复杂组合式支护结构在深基坑工程中的应用

某建设工程施工场地土质条件很差，周边环境复杂，给基坑支护方案选择带来很大难题，后初步设计挡土结构采用排桩内支撑支护结构，止水帷幕采用水泥土搅拌桩，但由于土质复杂，施工中又进行了多次动态调整设计，最终确定方案为北侧钻孔灌注桩结合搅拌桩、南侧冲击咬合桩结合压密注浆的复杂组合式支护结构，实践证明该支护方案施工效果良好。

The Application of Complex Composite Supporting Structure to Deep Foundation Pit

With very unfavorable geological conditions and complex surrounding environment,it is difficult to select an appropriate support scheme for the deep foundation pit. The support scheme was preliminarily designed to use soldier piles as the retaining structure and cement-soil-mixed wall as water-stop curtain. But due to the unexpected geological conditions,the support scheme was adjusted dynamically for several times to use in-situ pile and cement-soil-mixed wall at the north part and secant pile together wit...