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《Journal of Architecture and Civil Engineering》 2017-02
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Three-dimensional Finite Element Analysis on Earth Pressure Behavior of Flexible Retaining Structure

WANG Cheng-hua;WANG Ze;School of Civil Engineering,Tianjin University;  
In order to investigate the influence of foundation pit excavation on the earth pressure spatial distribution law of flexible retaining structure,and to provide references for the design and safety protection of foundation pit,the finite element model of foundation pit excavation was established by ABAQUS and the influence of the foundation pit excavation on spatial earth pressure of retaining structure"monolithic wall".The influences of different stiffness,with and without supports,different excavation depths on the earth pressure distribution and the displacement of different parts in retaining wall were considered.The three-dimensional earth pressure distribution of the retaining structure was compared with the two-dimensional data,and the necessity of three-dimensional finite element simulation was verified.The results show that"monolithic wall"active earth pressure zone appears a saddle shaped distribution,and the influence ranges of the behind and the bottom of retaining structure are about 2 times of excavation depth.Supporting structure greatly limits the scope of earth dangerous area behind the wall,but has no obvious limiting effect on the bottom of retaining structure.
【Fund】: 国家自然科学基金项目(51478313 50978182)
【CateGory Index】: TU476
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