碎石桩排水抗液化的一种实用化解析解
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摘要
碎石桩排水抗液化目前缺少简便且实用化的计算办法。在等应变砂井固结理论基础上,假定起始超静孔压按线性分布,给出了地震情况下碎石桩排水抗液化作用下的孔压比解答方法。为工程设计提供了一个简便可行的算法,采用径向平均孔压比计算即可满足工程需要。在与Onoue(1987)碎石桩排水原位试验结果对比的基础上,说明了该方法的可行性和偏差。对碎石桩排水抗液化设计参数选取提出了一些建议。
There is currently no simple and practical calculation method for the anti-liquefaction of gravel pile drainage.Based on the consolidation theories for sand wells under equal strain condition,assumed that the initial excess pore water pressure is linearly distributed,the solution method of pore pressure ratio of gravel pile under drainage and liquefaction resistance under earthquake is given.A simple and feasible algorithm for engineering design is provided,which is recommended to use radial average pore pressure ratio to meet project needs.On the basis of the comparison with Onoue( 1987) in-situ experimental results of gravel piles,the feasibility and deviation of the method are illustrated.Some suggestions are put forward for selection of design parameters of gravel drains to prevent liquefaction.
There is currently no simple and practical calculation method for the anti-liquefaction of gravel pile drainage.Based on the consolidation theories for sand wells under equal strain condition,assumed that the initial excess pore water pressure is linearly distributed,the solution method of pore pressure ratio of gravel pile under drainage and liquefaction resistance under earthquake is given.A simple and feasible algorithm for engineering design is provided,which is recommended to use radial average pore pressure ratio to meet project needs.On the basis of the comparison with Onoue( 1987) in-situ experimental results of gravel piles,the feasibility and deviation of the method are illustrated.Some suggestions are put forward for selection of design parameters of gravel drains to prevent liquefaction.
引文
[1]谢康和,曾国熙.等应变条件下的砂井地基固结解析理论[J].岩土工程学报,1989,11(2):3-17.
[2]SEED H B,BOOKER J R.Stabilization of potentially liquefiable sand deposits using gravel drains[J].Journal of the geotechnical engineering division,1977(7):757-768.
[3]ONOUE A,MORI N,TAKANO J.In-situ experiment and analysis on well resistance of gravel drains[J].Soils and foundations,1987,27(2):42-60.
[4]吴世明.土动力学[M].北京:中国建筑工业出版社,2000:267-268.
[5]徐志英.用砾石排水桩抗地震液化的砂基孔压计算[J].地震工程与工程振动,1992,12(4):88-92.
[6]张艳美,张鸿儒,张旭东.碎石桩复合地基中超孔压长消的解析解[J].中国港湾建设,2008(1):21-25.
[7]ONOUE A.Diagrams considering well resistance for designing spacing ratio of gravel drains[J].Soils and foundations,1988,28(3):160-168.
[8]徐妍,吴芳,谢康和,等.初始孔压非均布竖向排水井地基固结方程的解析解[J].水利学报,2008(7):829-835.
[9]洪毓康.土质学与土力学[M].2版.北京:人民交通出版社,1995.
[10]《工程地质手册》编委会.工程地质手册[M].5版.北京:中国建筑工业出版社,2018.
[11]STEVEN L K.Geotechnical earthquake engineering[M].New Jersey:Prentice-Hall,Inc.,1996.
[12]IDRISS I M,BOULANGER R W.Soil liquefaction during earthquakes[R].Oakland:Earthquake Engineering Research Institute(EERI),2008:92.
[13]Working Group No.34 of the Maritime Navigation Commission International Navigation Association.Seismic design guidelines for port structures[R].London:Taylor&Francis Group plc,2001:204-208.
[2]SEED H B,BOOKER J R.Stabilization of potentially liquefiable sand deposits using gravel drains[J].Journal of the geotechnical engineering division,1977(7):757-768.
[3]ONOUE A,MORI N,TAKANO J.In-situ experiment and analysis on well resistance of gravel drains[J].Soils and foundations,1987,27(2):42-60.
[4]吴世明.土动力学[M].北京:中国建筑工业出版社,2000:267-268.
[5]徐志英.用砾石排水桩抗地震液化的砂基孔压计算[J].地震工程与工程振动,1992,12(4):88-92.
[6]张艳美,张鸿儒,张旭东.碎石桩复合地基中超孔压长消的解析解[J].中国港湾建设,2008(1):21-25.
[7]ONOUE A.Diagrams considering well resistance for designing spacing ratio of gravel drains[J].Soils and foundations,1988,28(3):160-168.
[8]徐妍,吴芳,谢康和,等.初始孔压非均布竖向排水井地基固结方程的解析解[J].水利学报,2008(7):829-835.
[9]洪毓康.土质学与土力学[M].2版.北京:人民交通出版社,1995.
[10]《工程地质手册》编委会.工程地质手册[M].5版.北京:中国建筑工业出版社,2018.
[11]STEVEN L K.Geotechnical earthquake engineering[M].New Jersey:Prentice-Hall,Inc.,1996.
[12]IDRISS I M,BOULANGER R W.Soil liquefaction during earthquakes[R].Oakland:Earthquake Engineering Research Institute(EERI),2008:92.
[13]Working Group No.34 of the Maritime Navigation Commission International Navigation Association.Seismic design guidelines for port structures[R].London:Taylor&Francis Group plc,2001:204-208.