Deep Foundation Pit Support Technology Research And Engineering Application

In recent years,with the rapid development of urban subway construction,subway station construction is also rising,and the surrounding of city subway station is often crowded in the central area of the building,therefore,how to choose a safe and reasonable construction method and related supporting structure,how to monitor and ensure the construction safety and the safety of surrounding buildings is particularly important.The foundation pit engineering is a highly comprehensive system engineering,which involves three basic issues of strength,deformation and stability in soil mechanics.It also involves the interaction between soil and structure.Both to pay attention to the problem of strength,but also concerned about the deformation,these characteristics of the rock and soil workers put forward higher requirements.In the foundation pit,there exist structures further increases the difficulty and risk of foundation pit engineering.In this paper,according to the Ximenkou railway station project example,using FLAC3 D simulation software to the subway station foundation pit construction of the whole process of construction simulation,analysis of the deformation of the foundation pit after each construction process,the displacement of the retaining wall,the road surface subsidence and tilt of the surrounding buildings.At the same time,compare the calculation results and the monitoring data,and analysis the rationality and applicability of the relevant construction methods.