长平高速公路典型原状粉质粘土静动力学特性
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摘要
为了研究长(春)-(四)平高速公路路基典型原状粉质粘土静、动力学特性,分别进行了不同围压条件下固结不排水静三轴试验和共振柱试验.结果表明:长期运营后,公路路基原状粉质粘土的静、动力学性能与其先期固结状态有关;随着围压的增加,土体静强度增加,最大弹性模量增大;最大动剪切模量、参考剪应变幅值与固结围压呈线性增加关系;而最大阻尼比和阻尼比拟合参数随围压的升高而变化甚微.据此,给出了长平高速公路路基不同断面原状粉质粘土修改后的邓肯-张模型参数,以及最大动剪切模量、参考剪应变幅值最大阻尼比和阻尼比拟合参数的推荐值.
To investigate the static and dynamic mechanics properties of undisturbed silty clay sampled from the subgrade of Changchun-Siping highway,the consolidation undrained triaxial test and resonant column test were carried out under different confine pressures.Test results show that the properties of undisturbed silty clay are relate to the pre-consolidation condition.With the increasing of confine pressure,the static strength and the maximum elastic modulus increase.The relationship between maximum dynamic shear modulus,reference shear strain amplitude and confine pressure display a linear formulation.The confine pressure plays a little influence on the maximum damping ratio and the fitting parameters of damping ratio.Based on these,Duncan-Chang model parameters,maximum dynamic shear modulus and reference shear strain amplitude with the confine pressure were quantified.
To investigate the static and dynamic mechanics properties of undisturbed silty clay sampled from the subgrade of Changchun-Siping highway,the consolidation undrained triaxial test and resonant column test were carried out under different confine pressures.Test results show that the properties of undisturbed silty clay are relate to the pre-consolidation condition.With the increasing of confine pressure,the static strength and the maximum elastic modulus increase.The relationship between maximum dynamic shear modulus,reference shear strain amplitude and confine pressure display a linear formulation.The confine pressure plays a little influence on the maximum damping ratio and the fitting parameters of damping ratio.Based on these,Duncan-Chang model parameters,maximum dynamic shear modulus and reference shear strain amplitude with the confine pressure were quantified.
引文
[1]ALKIRE B D,MRRSION J M.Change in soil structuredue to freeze-thaw and repeated loading[J].Transporta-tion Research Record,1983,918:15-22.
[2]SIMONSEN E,JANOO V C,ISACSSON U.Resilientproperties of unbound road materials during seasonalfrost conditions[J].Journal of Cold Regions Engineer-ing,2002,16(1):28-50.
[3]齐吉琳,程国栋,PIETER P A.冻融作用对土工程性质影响的研究现状分析[J].地球科学进展,2005,20(8):887-894.
[4]ANDERSEN K H,ROSENBRAND W F,BROWN S F,et al.Cyclic and static laboratory tests on Drammen clay[J].Journal of the Geotechnical Engineering,1980,106(5):499-529.
[5]HYODO M,YASUARA K,HIRAO K.Prediction of claybehavior in undrained and partially cyclic triaxial tests[J].Soils and Foundations,1992,32(4):117-127.
[6]ROMO M P,JAIME A.Dynamic characteristics of someclays of Mexico Valley and seismic response of theground[R].Mexico City:Instituto de Ingenieria,1986.
[7]THEIRS G R,SEED H B.Cyclic stress strain characteris-tics of clay[J].Journal of the Soil Mechanics and Founda-tion Engineering Division,1968,94(2):555-569.
[8]TEACHAVORASINSKUN S,THONGCHIM P,LUKKU-NAPPASIT P.Shear modulus and damping ratio of aclay during undrained cyclic loading[J].Geotechnique,2001,51(5):467-470.
[9]尚守平,卢华喜,任慧,等.粉质粘土动剪切模量的试验对比研究[J].岩土工程学报,2006,28(3):410-414.
[10]袁晓铭,孙锐,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.
[11]陈国兴,刘雪珠,朱定华,等.南京新近沉积土动剪切模量比与阻尼比的试验研究[J].岩土工程学报,2006,28(8):1023-1027.
[12]蔡辉腾,李英民,欧秉松.福州地区典型土动剪切模量与阻尼比的试验研究[J].岩土力学,2010,31(2):361-365.
[13]吕小飞,陈培雄,杨义菊,等.海洋粉质粘土共振柱试验研究[J].世界地震工程,2010,26(sup):1-5.
[14]高志兵,高玉峰,谭慧明.饱和黏性土最大动剪切模量的室内和原位试验对比研究[J].岩土工程学报,2010,32(5):731-735.
[15]蒋通,邢海灵.围压对土动剪模量和阻尼比影响的简化计算方法[J].岩石力学与工程学报,2007,26(7):1432-1437.
[16]张克绪,谢君斐.土动力学[M].北京:地震出版社,1989.
[2]SIMONSEN E,JANOO V C,ISACSSON U.Resilientproperties of unbound road materials during seasonalfrost conditions[J].Journal of Cold Regions Engineer-ing,2002,16(1):28-50.
[3]齐吉琳,程国栋,PIETER P A.冻融作用对土工程性质影响的研究现状分析[J].地球科学进展,2005,20(8):887-894.
[4]ANDERSEN K H,ROSENBRAND W F,BROWN S F,et al.Cyclic and static laboratory tests on Drammen clay[J].Journal of the Geotechnical Engineering,1980,106(5):499-529.
[5]HYODO M,YASUARA K,HIRAO K.Prediction of claybehavior in undrained and partially cyclic triaxial tests[J].Soils and Foundations,1992,32(4):117-127.
[6]ROMO M P,JAIME A.Dynamic characteristics of someclays of Mexico Valley and seismic response of theground[R].Mexico City:Instituto de Ingenieria,1986.
[7]THEIRS G R,SEED H B.Cyclic stress strain characteris-tics of clay[J].Journal of the Soil Mechanics and Founda-tion Engineering Division,1968,94(2):555-569.
[8]TEACHAVORASINSKUN S,THONGCHIM P,LUKKU-NAPPASIT P.Shear modulus and damping ratio of aclay during undrained cyclic loading[J].Geotechnique,2001,51(5):467-470.
[9]尚守平,卢华喜,任慧,等.粉质粘土动剪切模量的试验对比研究[J].岩土工程学报,2006,28(3):410-414.
[10]袁晓铭,孙锐,孙静,等.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.
[11]陈国兴,刘雪珠,朱定华,等.南京新近沉积土动剪切模量比与阻尼比的试验研究[J].岩土工程学报,2006,28(8):1023-1027.
[12]蔡辉腾,李英民,欧秉松.福州地区典型土动剪切模量与阻尼比的试验研究[J].岩土力学,2010,31(2):361-365.
[13]吕小飞,陈培雄,杨义菊,等.海洋粉质粘土共振柱试验研究[J].世界地震工程,2010,26(sup):1-5.
[14]高志兵,高玉峰,谭慧明.饱和黏性土最大动剪切模量的室内和原位试验对比研究[J].岩土工程学报,2010,32(5):731-735.
[15]蒋通,邢海灵.围压对土动剪模量和阻尼比影响的简化计算方法[J].岩石力学与工程学报,2007,26(7):1432-1437.
[16]张克绪,谢君斐.土动力学[M].北京:地震出版社,1989.
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