紧邻建筑物某深基坑支护设计与评价

Design and Evaluation of Deep Foundation Pit Supporting Adjacent to the Building

对北京地区某紧邻建筑物的深基坑工程成功实例进行分析总结。采用复合钢管桩与灌注桩组合设计方案对基坑进行支护,有效控制了基坑本身及周边建筑物的变形,同时利用基坑侧壁土注浆的方式降低了坑壁表层土体的渗透性,起到了基坑止水作用.通过后期渗透试验数据及基坑监测结果,验证支护与止水方式的可行性,为类似工程提供参考.

This paper analyzes and summarizes a successful example of deep foundation pit project near a building in Beijing area.The combined design scheme of composite steel pipe pile and drilling pile is adopted to support the foundation pit,and effectively controls the deformation of the foundation pit and surrounding buildings.At the same time,the permeability of the surface soil of the pit is reduced by means of grouting on the side wall of the pit,which plays a role in preventing waterfrom flowing into the pit.The feasibility of supporting and waterproof method is verified through the data of seepage test and foundation pit monitoring in the later stage,which provides references for similar projects.