基于单桩抗压静载实验的桩筏基础协同分析数值模拟研究
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摘要
提供了一种桩筏基础协同作用沉降计算的数值模拟分析方法,以钻孔灌注桩单桩抗压静载试验为基础,应用三维有限元数值模拟软件对钻孔灌注桩桩-土相互作用进行了三维仿真模拟,通过反演得出符合工程实际的岩土参数,应用该参数建立桩筏基础数值模型,从而更加准确地模拟桩筏基础协同作用沉降过程。通过工程实例验证了利用该数值模拟分析方法的可行性,且计算成果可靠。
A numerical simulation analysis method for settlement calculation of pile-raft foundation with synergistic action is provided.Based on the static load test of single bored pile,the three-dimensional finite element numerical simulation software is used to simulate the interaction between bored pile and soil,and the inversion results are in line with the engineering practice.Based on the geotechnical parameters,a numerical model of pile-raft foundation is established,which can more accurately simulate the settlement process of pile-raft foundation with synergistic action.In this paper,the feasibility of the numerical simulation analysis method is verified by an engineering example,and the calculation results are reliable.
A numerical simulation analysis method for settlement calculation of pile-raft foundation with synergistic action is provided.Based on the static load test of single bored pile,the three-dimensional finite element numerical simulation software is used to simulate the interaction between bored pile and soil,and the inversion results are in line with the engineering practice.Based on the geotechnical parameters,a numerical model of pile-raft foundation is established,which can more accurately simulate the settlement process of pile-raft foundation with synergistic action.In this paper,the feasibility of the numerical simulation analysis method is verified by an engineering example,and the calculation results are reliable.
引文
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[8]夏力农,苗云东,廖常斌.地基土沉降对复合地基影响的三维数值模拟[J].岩土力学,2012,33(4):1217-1222.
[9]尹骥,魏建华.基于地基-基础-上部结构共同作用分析的长短PHC管桩基础处理[J].岩土工程学报,2011,33(S2):265-270.
[10]JGJ 106-2014,建筑基桩检测技术规范[S].
[11]JGJ 6-2011,高层建筑筏形与箱型基础技术规范[S].
[2]Poulos H G.Piled raft foundations:Design and applications[J].Geotechnique,2001,51(2):95-113.
[3]POULOS H G,DAVIDS A J.Foundation design for the emirates twin towers,Dubai[J].Canadian Geotechnical Journal,2005(42):716-730.
[4]POULOS H G,GRAHAME BUNCE.Foundation design for the Burj DubaiThe world's tallest building[C]//6th International Conference on Case Histories in Geotechnical Engineering.Arlington,VA:[s.n.],2008:1-16.
[5]REUL O,RANDOLPH M F.Piled rafts in over-consolidated clay:Comparison of in-situ measurements and numerical analysis[J].Geotechnique,2003,53(3):301-315.
[6]姚祖恩,张季容,吴志平.墙下筏板基础共同作用分析方法探讨[J].岩土工程学报,1993,15(2):80-85.
[7]周定松,王莺哥,张保印.考虑筒体结构刚度影响的筏板内力与变形研究[J].四川建筑科学研究,2003,29(2):14-17.
[8]夏力农,苗云东,廖常斌.地基土沉降对复合地基影响的三维数值模拟[J].岩土力学,2012,33(4):1217-1222.
[9]尹骥,魏建华.基于地基-基础-上部结构共同作用分析的长短PHC管桩基础处理[J].岩土工程学报,2011,33(S2):265-270.
[10]JGJ 106-2014,建筑基桩检测技术规范[S].
[11]JGJ 6-2011,高层建筑筏形与箱型基础技术规范[S].