放坡结合扶壁管桩支护在软土地区深基坑工程中的应用

Application of Slope Combined with Buttress Pipe Pile Support in Deep Foundation Excavation Engineering in Soft Soil Area

结合天津软土地区某工程的深厚填土区域的基坑支护工程实例,采用放坡结合扶壁管桩支护结构,替代常用的钻孔灌注桩+支撑的支护方式,取消了水平支撑体系。通过监测分析了基坑的变形规律,结果表明采用扶壁桩有利于减少基坑位移,增加了基坑支护结构的可靠性,取得效果良好及社会效益和经济效益。

Combined with the deep excavation support engineering example of a project in deep-thick backfill area in Tianjin soft area,bored piles combing with interior supporting system is replaced by putting the slope and buttress pile support system. By monitoring the deformation law of foundation pit are analyzed and the results show that buttress support system can reduce foundation displacement and increase the reliability of foundation excavation support structure,get good effect and social and economic benefits,and be available for similar engineering reference.