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《Journal of Tongji University(Natural Science)》 2009-05
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Simulation of Soil Deformation Due to Pit Excavation with Particle Flow Code

JIA Mincai1,2,WANG Lei2,ZHOU Jian1,2 (1.Key Laboratory of Geotechnical Engineering of the Ministry of Education,Tongji University,Shanghai 200092,China;2.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China)  
Numerical simulations of macro-meso mechanical behaviour of an excavation process supported by deep mixing piles were performed by secondary exploitation using the Particle Flow Code in 2 Dimensions(PFC2D code),which was developed based on the assemblies of particlular materials.The PFC2D model of a real pit was established according to similarity theory,and the meso-scale parameters of soils in the model were determined through a series of calibration biaxial tests in order to link the change of meso-scale fabric to macro-scale response.Deformations of ground surface were analysized for all excavation steps,including heaves of pit bottom and horizontal displacements of mixing piles.The study verifies that PFC2D can be used to visualize the evolution of excavation process.Comparison between simulation results and the measured data proves the feasibility to explore the interaction mechanism of retaining structure and soils around from the prospect of the meso-mechanics.
【Fund】: 国家自然科学基金资助项目(50578122);; 上海市重点学科建设资助项目(B308)
【CateGory Index】: TU753
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Chinese Journal Full-text Database 3 Hits
1 YANG Lin-de, SHI Pei-ling, YANG Chao(Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China);Stochastic Prediction of Deformation and Security of Foundation Pit[J];Journal of Tongji University;2002-04
2 ZHOU Jian1,LIAO Xiong-hua1,CHI Yong1,XU Jian-ping2 (1.Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China; 2.General Office of the Limited Railway Traffic Company of Wuhan City,Wuhan 430017,China);Simulating Plane Strain Test of Soils by Particle Flow Code[J];Journal of Tongji University;2002-09
3 Yu Jianlin Gong Xiaonan (Zhejiang University);RESEARCH ON DEFORMATION OF FOUNDATION-PIT ENGINEERING[J];;2002-04
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