喷锚支护结构在膨胀土地区基坑支护中的应用

Application of Combined Bolting and Shotcrete Structure in Swelling Soil Area Foundation Pit Support

膨胀土地区的基坑支护一般采用土钉墙型式,但出现了较多的垮塌事故。详细介绍了邯郸市某小区综合楼的膨胀土基坑喷锚支护工程的设计与施工方法。考虑膨胀土吸水膨胀失水收缩对边坡稳定性的影响,针对基坑支护结构验算的相关参数,依据膨胀土地区情况给予了相应的调整。基坑分层开挖进行喷锚支护后整体稳定性较好,达到了预期目的。本实例旨在为膨胀土地区基坑支护设计与施工提供一个借鉴和参考。

The foundation pit support in swelling soil generally uses soil nailing typed support, but a lot of collapse accidents happened. The paper introduced design and construction method of a building complex swelling soil foundation pit combined bolting and shotcrete engineering in a Handan housing estate in detail. Considering the impacts from swelling soil water absorption swelling and dehydration shrinking on slope stability, in allusion to related parameters in foundation support structure checking computations, according to swell- ing soil area practical situation have made corresponding adjustments. Excavation in layers, the stability of foundation pit is rather good alter combined bolting and shotcrete thus achieved the anticipated results. The case study is aimed at providing a reference tor founda- tion pit design and construction in swelling soil areas.