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《Sichuan Building Science》 2013-01
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The selection and numerical analysis of behavior of pile-raft foundtion on super-deep karst

ZHU Junfeng,FANG Congqi(School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiaotong University,Shanghai 200240,China)  
Combined with the Wuxi World Trade Center project,discussing the selection of pile-raft foundation on super-deep karst,at the same time,studyingnumerically on the interaction of the pile-raft foundation on the super-deep karst by ABAQUS.The soil material is elastic-plastic,the upper structure and the pile-raft foundation using elastic material,then doing nonlinear analysis on the interaction of the three on vertical load nonlinear and studying the behavior of pile-raft foundation of super-high building on karst with the measured data together.The analysis shows that the pile-raft foudation that using friction pile and combined the caves grouting method to deal with the deep karst is availible.The numerical analysis result of internal force distribution and settlement is agree with the measured data.Using super-long friction pile can reduce the effection on the deep karst.The internal force distribution of raft is related with upper structure and pile arrangement.
【Fund】: 国家自然科学基金资助项目(51178264);国家自然科学基金资助项目(51048001);; 铁道部科技研究开发计划资助项目(J2011G003)
【CateGory Index】: TU473.12
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【Co-citations】
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