饱和南京细砂孔压增量模型的普适性研究
|
摘要
循环荷载作用下饱和砂土的孔压增长规律是土动力学的核心内容之一。基于笔者在给定相对密度、均等固结条件下饱和南京细砂的不排水等幅循环三轴试验结果建立的孔压增量模型,进一步进行了不同相对密度、不同固结比务件下饱和南京细砂的不排水等幅循环三轴试验,将上述均等固结的孔压增量模型拓展为适用于不同相对密度、均等和非均等固结条件的孔压增量模型。采用拓展后的孔压增量模型对试验结果进行分析的结果表明:通过该孔压增量模型预测验证试验的孔压与验证试验测试的孔压具有较好的一致性,说明该孔压增量模型具有普适性。
The pore water pressure(PWP) increase in saturated sand under cyclic loading is one of the key part of the soil dynamics.Based on the PWP increment model developed on the basis of the undrained constant-amplitude cyclic triaxial tests on saturated Nanjing fine sand with given relative density under isotropic consolidation,further undrained constant-amplitude cyclic triaxial tests were carried out on saturated Nanjing fine sand with different relative densities under isotropic or anisotropic consolidation.The PWP increment model suited for given relative density and isotropic consolidation is extended to different relative densities and anisotropic consolidation.The results show that the pore water pressure predicted from the PWP increment model is consistent with that from test measurements better and the model has its universality.
The pore water pressure(PWP) increase in saturated sand under cyclic loading is one of the key part of the soil dynamics.Based on the PWP increment model developed on the basis of the undrained constant-amplitude cyclic triaxial tests on saturated Nanjing fine sand with given relative density under isotropic consolidation,further undrained constant-amplitude cyclic triaxial tests were carried out on saturated Nanjing fine sand with different relative densities under isotropic or anisotropic consolidation.The PWP increment model suited for given relative density and isotropic consolidation is extended to different relative densities and anisotropic consolidation.The results show that the pore water pressure predicted from the PWP increment model is consistent with that from test measurements better and the model has its universality.
引文
[1]Seed H B,Martin P P,Lysmer J.Pore-water pressure changes during soil liquefaction[J].American Society of Civil Engineers,Journal of the Geotechnical Engineering Division,1976,102(4):323-346.
[2]Finn W,Bhatia S.Prediction of seismic porewater pressures[J].Proceedings of the International Conference on Soil Mechanics and Foundation Engineering, Stockholm,1981,(3):201-206.
[3]张建民,谢定义.饱和砂土振动孔隙水压力增长的实用算法[J].水利学报,1991,(8):45-51. Zhang J M,Xie D Y.A practical method for calculation of seismic excess pore water pressure in saturated sand[J].Journal of Hydraulic Engineering,1991, (8):45-51.
[4]陈国兴,刘雪珠.南京粉质黏土与粉砂互层土及粉细砂的振动孔压发展规律研究[J].岩土工程学报,2004,26 (1):79-82. Chen G X,Liu X Z.Study on dynamic pore water pressure in silty clay interbedded with fine sand of Nanjing[J].Chinese Journal of Geotechnical Engineering, 2004,26(1):79-82.
[5]Finn W D,Lee K W,Martin G R.An effective stress model for liquefaction[J].American Society of Civil Engineers,Journal of the Geotechnical Engineering Division,1977,103(6):517-533.
[6]Finn W D,Byrne P M,Martin G R.Seismic response and liquefaction of sands[J].American Society of Civil Engineers,Journal of the Geotechnical Engineering Division,1976,102(8):841-856.
[7]Ishibashi I,Sherif M A,Tsuchiya C.Pore-pressure rise mechanism and soil liquefaction[J].Soils and Foundations,1977,17(2):17-27.
[8]丰万玲,石兆吉.判别水平土层液化势的孔隙水压力分析方法[J].工程抗震与加固改造,1988,(4):30-33. Feng W L,Shi Z J.An analytical method using porewater pressure for evaluation of liquefaction potential in level soil layer[J].Earthquake Resistant Engineering and Retrofitting,1988,(4):30-33.
[9]孙锐,袁晓铭.非均等固结下饱和砂土孔压增量简化计算公式[J].岩土工程学报,2005,27(9):1021-1025. Sun R,Yuan X M.Simplified incremental formula for estimating pore water pressure of saturated sands under anisotropic consolidation[J].Chinese Journal of Geotechnical Engineering,2005,27(9):1021-1025.
[10]Ivsic T.A model for presentation of seismic pore water pressures[J].Soil Dynamics and Earthquake Engineering, 2006,26(2-4 SPEC ISS):191-199.
[11]Green R A,Mitchell J K,Polito C P.An energy-based excess pore pressure generation model for cohe-sionless soils[C]//Proceedings of the John Booker Memorial Symposium,Netherlanls,Rotterdam:A. A.Balkema Publishers,2000.
[12]郭莹,刘艳华,栾茂田,等.复杂应力条件下饱和松砂振动孔隙水压力增长的能量模式[J].岩土工程学报, 2005,27(12):1380-1385. Guo Y,Liu Y H,Luan M T,et al.Energy-based model of vibration-induced pore water pressure buildup of saturated loose sand under complex stress condition [J].Chinese Journal of Geotechnical Engineering, 2005,27(12):1380-1385.
[13]王炳辉,陈国兴.循环荷载下饱和南京细砂的孔压增量模型[J].岩土工程学报,2011(待刊). Wang B H,Chen G X.A pore water pressure increment model for saturated nanjing fine sand subjected to cyclic loading[J].Chinese Journal of Geotechnical Engineering,2011(accepted).
[14]Ishihara K,Tatsuoka F,Yasuda S.Undrained deformation and liquefaction of sand under cyclic stresses [J].Soils and Foundations,1975,15(1):29-44.
[15]楚锡华.基于连续介质模型的颗粒材料孔隙度及孔隙水压力计算公式[J].岩土工程学报,2009,31(8): 1255-1257. Chu X H.Evolution of porosity and pore water pressure of granular materials based on continuum model [J].Chinese Journal of Geotechnical Engineering, 2009,31(8):1255-1257.
[16]陈国兴,朱定华,何启智.DSZ-1型动三轴试验机研制与性能试验[J].地震工程与工程振动,2002,22(6): 71-74. Chen G X,Zhu D H,He Q Z.Development and test of DSZ-1 cyclic triaxial testing system[J].Earthquake Engineering and Engineering Vibaration,2002,22 (6):71-74.
[17]Ishihara K.Soil Behavior in Earthquake Geotechnics [M].Oxford:Clarendon Press,1996.
[18]张克绪.饱和砂土的液化应力条件[J].地震工程与工程振动,1984,(1):99-109. Zhang K X.Stress condition inducing liquefaction of saturated sand[J].Earthquake Engineering and Engineering Vibration,1984,(1):99-109.
[2]Finn W,Bhatia S.Prediction of seismic porewater pressures[J].Proceedings of the International Conference on Soil Mechanics and Foundation Engineering, Stockholm,1981,(3):201-206.
[3]张建民,谢定义.饱和砂土振动孔隙水压力增长的实用算法[J].水利学报,1991,(8):45-51. Zhang J M,Xie D Y.A practical method for calculation of seismic excess pore water pressure in saturated sand[J].Journal of Hydraulic Engineering,1991, (8):45-51.
[4]陈国兴,刘雪珠.南京粉质黏土与粉砂互层土及粉细砂的振动孔压发展规律研究[J].岩土工程学报,2004,26 (1):79-82. Chen G X,Liu X Z.Study on dynamic pore water pressure in silty clay interbedded with fine sand of Nanjing[J].Chinese Journal of Geotechnical Engineering, 2004,26(1):79-82.
[5]Finn W D,Lee K W,Martin G R.An effective stress model for liquefaction[J].American Society of Civil Engineers,Journal of the Geotechnical Engineering Division,1977,103(6):517-533.
[6]Finn W D,Byrne P M,Martin G R.Seismic response and liquefaction of sands[J].American Society of Civil Engineers,Journal of the Geotechnical Engineering Division,1976,102(8):841-856.
[7]Ishibashi I,Sherif M A,Tsuchiya C.Pore-pressure rise mechanism and soil liquefaction[J].Soils and Foundations,1977,17(2):17-27.
[8]丰万玲,石兆吉.判别水平土层液化势的孔隙水压力分析方法[J].工程抗震与加固改造,1988,(4):30-33. Feng W L,Shi Z J.An analytical method using porewater pressure for evaluation of liquefaction potential in level soil layer[J].Earthquake Resistant Engineering and Retrofitting,1988,(4):30-33.
[9]孙锐,袁晓铭.非均等固结下饱和砂土孔压增量简化计算公式[J].岩土工程学报,2005,27(9):1021-1025. Sun R,Yuan X M.Simplified incremental formula for estimating pore water pressure of saturated sands under anisotropic consolidation[J].Chinese Journal of Geotechnical Engineering,2005,27(9):1021-1025.
[10]Ivsic T.A model for presentation of seismic pore water pressures[J].Soil Dynamics and Earthquake Engineering, 2006,26(2-4 SPEC ISS):191-199.
[11]Green R A,Mitchell J K,Polito C P.An energy-based excess pore pressure generation model for cohe-sionless soils[C]//Proceedings of the John Booker Memorial Symposium,Netherlanls,Rotterdam:A. A.Balkema Publishers,2000.
[12]郭莹,刘艳华,栾茂田,等.复杂应力条件下饱和松砂振动孔隙水压力增长的能量模式[J].岩土工程学报, 2005,27(12):1380-1385. Guo Y,Liu Y H,Luan M T,et al.Energy-based model of vibration-induced pore water pressure buildup of saturated loose sand under complex stress condition [J].Chinese Journal of Geotechnical Engineering, 2005,27(12):1380-1385.
[13]王炳辉,陈国兴.循环荷载下饱和南京细砂的孔压增量模型[J].岩土工程学报,2011(待刊). Wang B H,Chen G X.A pore water pressure increment model for saturated nanjing fine sand subjected to cyclic loading[J].Chinese Journal of Geotechnical Engineering,2011(accepted).
[14]Ishihara K,Tatsuoka F,Yasuda S.Undrained deformation and liquefaction of sand under cyclic stresses [J].Soils and Foundations,1975,15(1):29-44.
[15]楚锡华.基于连续介质模型的颗粒材料孔隙度及孔隙水压力计算公式[J].岩土工程学报,2009,31(8): 1255-1257. Chu X H.Evolution of porosity and pore water pressure of granular materials based on continuum model [J].Chinese Journal of Geotechnical Engineering, 2009,31(8):1255-1257.
[16]陈国兴,朱定华,何启智.DSZ-1型动三轴试验机研制与性能试验[J].地震工程与工程振动,2002,22(6): 71-74. Chen G X,Zhu D H,He Q Z.Development and test of DSZ-1 cyclic triaxial testing system[J].Earthquake Engineering and Engineering Vibaration,2002,22 (6):71-74.
[17]Ishihara K.Soil Behavior in Earthquake Geotechnics [M].Oxford:Clarendon Press,1996.
[18]张克绪.饱和砂土的液化应力条件[J].地震工程与工程振动,1984,(1):99-109. Zhang K X.Stress condition inducing liquefaction of saturated sand[J].Earthquake Engineering and Engineering Vibration,1984,(1):99-109.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心