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

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 water from 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.