碎石桩加固液化砂土地基的数值模拟分析
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摘要
该文采用三维有限差分程序FLAC3D(Fast Lagrangian Analysis of Continua)对未加固和碎石桩加固的液化砂土地基进行数值模拟,对其建立模型以及进行地震响应分析,得到碎石桩加固液化地基土模型的抗液化效果。经数值分析,证实了碎石桩具有显著的排水效果。同时与振动台试验数据相比较,论证了数值模拟结果的可靠性。
In the paper,the liquefiable sand soil non-improved and improved by gravel piles under earthquake action is numerically simulated by using the three-dimensional finite difference program 'FLAC3D'(Fast Lagrangian Analysis of Continua),and a model to analyze seismic response is established in order to investigate the results of liquefiable sand soil reinforced by gravel piles.According to the analysis of the numerical simulation,the gravel piles confirmed have remarkable drainage effect.Compared with the result of shaking table tests,it is demonstrated that the test of Numerical simulation is reliable.
In the paper,the liquefiable sand soil non-improved and improved by gravel piles under earthquake action is numerically simulated by using the three-dimensional finite difference program 'FLAC3D'(Fast Lagrangian Analysis of Continua),and a model to analyze seismic response is established in order to investigate the results of liquefiable sand soil reinforced by gravel piles.According to the analysis of the numerical simulation,the gravel piles confirmed have remarkable drainage effect.Compared with the result of shaking table tests,it is demonstrated that the test of Numerical simulation is reliable.
引文
[1]陈育民,徐鼎平.FLAC/FLAC3D基础与工程实例[M].北京:中国水利水电出版社,2009.Chen Yumin,Xu Dingping.FLAC/FLAC3D basis and project case[M].Beijing:China Water Power Press,2009.(in Chinese)
[2]杨庆陶.桩体加固液化砂土的振动台试验研究[D].太原:太原理工大学,2008.Yang Qingtao.Study on the shaking table experimental liquefiable sand soil improved by pile[D].Taiyuan:Taiyuan University of Technology,2008.(in Chinese)
[3]张明.碎石桩复合地基抗液化性能的数值模拟[D].太原:太原理工大学,2010.Zhang Ming.Numerical simulation of anti-liquefaction characteristics of gravel pile composite foundation[D].Taiyuan:Taiyuan University of Technology,2010.(in Chinese)
[4]张艳美,张鸿儒,张旭东.碎石桩复合地基三维地震响应分析[J].工程地质学报,2008,16(1):47―52.Zhang Yanmei,Zhang Hongru,Zhang Xudong.Gravel pile composite foundation of 3D seismic response analysis[J].Journal of Engineering Geology,2008,16(1):47―52.(in Chinese)
[5]牛琪瑛,郭英,吴永娟,张明.碎石桩加固不同密实度液化土的孔隙水压力变化规律探讨[J].工程力学,2010,27(增刊Ⅰ):159―163.Niu Qiying,Guo Ying,Wu Yongjuan,Zhang Ming.Study on pore water pressure variation of different density liquefiable sand soil reinforced by gravel pile[J].Engineering Mechanics,2010,27(Sup.Ⅰ):159―163.(in Chinese)
[6]牛琪瑛,张明,杨庆陶.桩体加固液化砂土模型地基沉降分析[J].工程抗震与加固改造,2009,31(6):116―119.Niu Qiying,Zhang Ming,Yang Qingtao.Study on settlement of liquefiable sand soil model improved by pile[J].Earthquake Resistant Engineering and Retrofitting,2009,31(6):116―119.(in Chinese)
[7]杨庆陶,魏剑伟,牛琪瑛.碎石桩复合地基的抗液化研究[C].第16届全国结构工程学术会议论文集,2007,II:368―372.Yang Qingtao,Wei Jianwei,Niu Qiying.Study on composite foundation of gravel pile for liquefaction resistance[C].Proceedings of the 16th National Conference on Structural Engineering,2007,II:368―372.(in Chinese)
[8]张艳美,张鸿儒.碎石桩设计参数对复合地基抗液化性能的影响[J].岩土力学,2008,29(5):1320―1324.Zhang Yanmei,Zhang Hongru.Influence of stone columns design parameters on anti-liquefaction nature of composite foundation[J].Rock and Soil Mechanics,2008,29(5):1320―1324.(in Chinese)
[9]Niu Qiying,Yan Weize,Yang Qingtao,Wei Jianwei.Research on liquefaction of sandy soil in shaking table test[C]//Yeung Albert T.9th International Symposium on Environmental Geotechnology and Global Sustainable Development,2008:435―441.
[10]李培振,任红梅,吕西林,程磊.液化地基自由场振动台模型试验研究[J].地震工程与工程振动,2008,28(2):172―178.Li Peizhen,Ren Hongmei,Lu Xilin,Cheng Lei.Study on shaking table test on free field considering soil liquefaction[J].Earthquake Engineering and Engineering Vibration,2008,28(2):172―178.(in Chinese)
[11]吴永娟.碎石桩加固不同密实度液化砂土的振动台试验研究[D].太原:太原理工大学,2009.Wu Yongjuan.Study on the shaking table experimental liquefiable sand soil with different density improved by gravel pile[D].Taiyuan:Taiyuan University of Technology,2009.(in Chinese)-0.1 0 5 10 15 20时间/s比压孔0.60.50.40.30.20.10?2.5m?4.5m?6.5m
[2]杨庆陶.桩体加固液化砂土的振动台试验研究[D].太原:太原理工大学,2008.Yang Qingtao.Study on the shaking table experimental liquefiable sand soil improved by pile[D].Taiyuan:Taiyuan University of Technology,2008.(in Chinese)
[3]张明.碎石桩复合地基抗液化性能的数值模拟[D].太原:太原理工大学,2010.Zhang Ming.Numerical simulation of anti-liquefaction characteristics of gravel pile composite foundation[D].Taiyuan:Taiyuan University of Technology,2010.(in Chinese)
[4]张艳美,张鸿儒,张旭东.碎石桩复合地基三维地震响应分析[J].工程地质学报,2008,16(1):47―52.Zhang Yanmei,Zhang Hongru,Zhang Xudong.Gravel pile composite foundation of 3D seismic response analysis[J].Journal of Engineering Geology,2008,16(1):47―52.(in Chinese)
[5]牛琪瑛,郭英,吴永娟,张明.碎石桩加固不同密实度液化土的孔隙水压力变化规律探讨[J].工程力学,2010,27(增刊Ⅰ):159―163.Niu Qiying,Guo Ying,Wu Yongjuan,Zhang Ming.Study on pore water pressure variation of different density liquefiable sand soil reinforced by gravel pile[J].Engineering Mechanics,2010,27(Sup.Ⅰ):159―163.(in Chinese)
[6]牛琪瑛,张明,杨庆陶.桩体加固液化砂土模型地基沉降分析[J].工程抗震与加固改造,2009,31(6):116―119.Niu Qiying,Zhang Ming,Yang Qingtao.Study on settlement of liquefiable sand soil model improved by pile[J].Earthquake Resistant Engineering and Retrofitting,2009,31(6):116―119.(in Chinese)
[7]杨庆陶,魏剑伟,牛琪瑛.碎石桩复合地基的抗液化研究[C].第16届全国结构工程学术会议论文集,2007,II:368―372.Yang Qingtao,Wei Jianwei,Niu Qiying.Study on composite foundation of gravel pile for liquefaction resistance[C].Proceedings of the 16th National Conference on Structural Engineering,2007,II:368―372.(in Chinese)
[8]张艳美,张鸿儒.碎石桩设计参数对复合地基抗液化性能的影响[J].岩土力学,2008,29(5):1320―1324.Zhang Yanmei,Zhang Hongru.Influence of stone columns design parameters on anti-liquefaction nature of composite foundation[J].Rock and Soil Mechanics,2008,29(5):1320―1324.(in Chinese)
[9]Niu Qiying,Yan Weize,Yang Qingtao,Wei Jianwei.Research on liquefaction of sandy soil in shaking table test[C]//Yeung Albert T.9th International Symposium on Environmental Geotechnology and Global Sustainable Development,2008:435―441.
[10]李培振,任红梅,吕西林,程磊.液化地基自由场振动台模型试验研究[J].地震工程与工程振动,2008,28(2):172―178.Li Peizhen,Ren Hongmei,Lu Xilin,Cheng Lei.Study on shaking table test on free field considering soil liquefaction[J].Earthquake Engineering and Engineering Vibration,2008,28(2):172―178.(in Chinese)
[11]吴永娟.碎石桩加固不同密实度液化砂土的振动台试验研究[D].太原:太原理工大学,2009.Wu Yongjuan.Study on the shaking table experimental liquefiable sand soil with different density improved by gravel pile[D].Taiyuan:Taiyuan University of Technology,2009.(in Chinese)-0.1 0 5 10 15 20时间/s比压孔0.60.50.40.30.20.10?2.5m?4.5m?6.5m
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