With the rapid development of urbanization and the increasing scarcity of land resources,the deep foundation pit projects are increasing in the urban construction.The problems of foundation pit services extension caused by projects delay scheme and construction difficulties also occur,which not only increases construction costs but also poses environmental and safety risks.Therefore,implementing an effective secondary reinforcement design is of utmost importance.This paper,based on a case study of an over-service deep foundation pit project in Xi'an,uses the strength reduction method of support components to reinforce the sections of three types of support forms:anchor piles,composite soil nail walls,and cantilever piles.A finite element model of the deep foundation pit is established to simulate and analyze the stability and displacement before and after reinforcement.The results indicate that after the reinforcement design of the foundation pit using the strength reduction method of support components,the numerical simulation results are in good agreement with the actual measured values,and the overall stability,horizontal deformation,and vertical deformation of the foundation pit all comply with the regulatory requirements.The reinforcement of the over-serviced foundation using the strength reduction method of support components is rational and effective.
关键词
超期深基坑/支护构件/强度折减法/Midas/GTS/基坑加固设计
Key words
overdue deep foundation pit/support components/strength reduction method/Midas GTS/reinforcement design of the foundation pit
维普
万方数据