天然含水率状态下原状黄土动强度特性研究
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摘要
通过对不同天然含水率状态下兰州原状黄土的室内动强度试验,得出了相应破坏振次为10和20次时原状黄土的动强度参数。根据试验所得动强度参数,分析了原状黄土的动强度参数随天然含水率和破坏振次的变化规律。探讨了天然含水率、破坏振次对该地区原状黄土动强度指标的影响,并对原状黄土的动强度参数与天然含水率之间的关系曲线进行了拟合,给出了其数学表达式。结果表明,动凝聚力与动内摩擦角随天然含水率变化规律,较好地符合乘幂函数关系和线性关系。
By dynamic strength experiment on undisturbed Lanzhou loess with different natural moisture content,dynamic strength parameters of loess,corresponding with destroying vibration numbers of 10 and 20,were obtained.Thereby,variation rules of dynamic strength parameters of loess were analyzed under different natural moisture contents and destroying vibration numbers,and the influences of natural moisture content and destroying vibration number on dynamic strength index of undisturbed loess were discussed.Besides that,the relation curve between dynamic strength parameters and natural moisture content of undisturbed loess was fitted,and the mathematical formula of the relation was given.At last,the results show that variation rules of dynamic cohesive strength and internal friction angle are in accord with power function relation and linear relation well.
By dynamic strength experiment on undisturbed Lanzhou loess with different natural moisture content,dynamic strength parameters of loess,corresponding with destroying vibration numbers of 10 and 20,were obtained.Thereby,variation rules of dynamic strength parameters of loess were analyzed under different natural moisture contents and destroying vibration numbers,and the influences of natural moisture content and destroying vibration number on dynamic strength index of undisturbed loess were discussed.Besides that,the relation curve between dynamic strength parameters and natural moisture content of undisturbed loess was fitted,and the mathematical formula of the relation was given.At last,the results show that variation rules of dynamic cohesive strength and internal friction angle are in accord with power function relation and linear relation well.
引文
[1]骆亚生,谢定义,陈存礼.黄土不同湿度状态下破坏动强度的试验分析[J].西安理工大学学报,2001,17(4):403-407.LUO Y S,XIE D Y,CHEN C L.Test analysis of dynamic failure strength of loess under different moisture conditions[J].Journal of Xi’an Univer-sity of Technology,2001,17(4):403-407.
[2]栗润德,张鸿儒,白晓红,等.不同含水量下原状黄土动强度和震陷的试验研究[J].工程地质学报,2007,15(5):694-699.LI R D,ZHANG H R,BAI X H,et al.Dynamic shear strength and seismic subsidence of intact loess with different water contents from dynamic tri-axial testing[J],Jou rnal of Engineering Geology,2007,15(5):694-699.
[3]田堪良,张慧莉,张伯平,等.非饱和黄土静、动强度及其相关性研究[J].防灾减灾工程学报,2007,27(1):91-95.TIAN K L,ZHANG H L,ZHANG B P,et al.Research on static and dynamic Strength of unsaturated loess and the correlation between them[J],Journal of Disaster Prevention and Mitigation Engineering,2007,27(1):91-95.
[4]梁庆国,李洁,李德武,等.黄土隧道围岩分级研究的若干问题[J].岩土工程学报,2011,33(S):170-176.LIANG Q G,LI J,LI D W,et al.Some problems on surrounding rock classification of loess tunnels[J],Chinese Journal of Geotechnical Engi-neering,2011,33(S):170-176.
[5]王兰民.黄土动力学[M].北京:地震出版社,2003.WANG L M.Loess dynamics[M],Beijing:Seismological Press,2003.
[6]余文龙,张健,张顺峰,等.黄土结构性定量化研究新进展[J].水文地质工程地质,2011,38(5):120-127.YU W L,ZHANG J,ZHANG S F,et al.Advances in quantitative structural research of loess[J],Hydrogeology&Engineering Geology,2011,38(5):120-127.
[7]王峻,王兰民,王平,等.不同地区饱和黄土液化特性研究[J].水文地质工程地质,2011,38(5):54-57.WANG J,WANG L M,WANG P,et al.A study of liquefaction characterisitcs of saturated loess in different regions[J].Hydrogeology&Engineer-ing Geology,2011,38(5):54-57.
[8]王谦,王兰民,袁中夏,等.汶川地震中甘肃清水田川黄土液化的试验研究[J].水文地质工程地质,2012,39(2):116-120.WANG Q,WANG L M,YUAN Z X,et al.Study on Loess Liquefaction in Tianchuan,Qingshui county,Gansu province Induced by WenchuanMs8.0 Earthquake[J],Hydrogeology&Engineering Geology,2012,39(2):116-120.
[2]栗润德,张鸿儒,白晓红,等.不同含水量下原状黄土动强度和震陷的试验研究[J].工程地质学报,2007,15(5):694-699.LI R D,ZHANG H R,BAI X H,et al.Dynamic shear strength and seismic subsidence of intact loess with different water contents from dynamic tri-axial testing[J],Jou rnal of Engineering Geology,2007,15(5):694-699.
[3]田堪良,张慧莉,张伯平,等.非饱和黄土静、动强度及其相关性研究[J].防灾减灾工程学报,2007,27(1):91-95.TIAN K L,ZHANG H L,ZHANG B P,et al.Research on static and dynamic Strength of unsaturated loess and the correlation between them[J],Journal of Disaster Prevention and Mitigation Engineering,2007,27(1):91-95.
[4]梁庆国,李洁,李德武,等.黄土隧道围岩分级研究的若干问题[J].岩土工程学报,2011,33(S):170-176.LIANG Q G,LI J,LI D W,et al.Some problems on surrounding rock classification of loess tunnels[J],Chinese Journal of Geotechnical Engi-neering,2011,33(S):170-176.
[5]王兰民.黄土动力学[M].北京:地震出版社,2003.WANG L M.Loess dynamics[M],Beijing:Seismological Press,2003.
[6]余文龙,张健,张顺峰,等.黄土结构性定量化研究新进展[J].水文地质工程地质,2011,38(5):120-127.YU W L,ZHANG J,ZHANG S F,et al.Advances in quantitative structural research of loess[J],Hydrogeology&Engineering Geology,2011,38(5):120-127.
[7]王峻,王兰民,王平,等.不同地区饱和黄土液化特性研究[J].水文地质工程地质,2011,38(5):54-57.WANG J,WANG L M,WANG P,et al.A study of liquefaction characterisitcs of saturated loess in different regions[J].Hydrogeology&Engineer-ing Geology,2011,38(5):54-57.
[8]王谦,王兰民,袁中夏,等.汶川地震中甘肃清水田川黄土液化的试验研究[J].水文地质工程地质,2012,39(2):116-120.WANG Q,WANG L M,YUAN Z X,et al.Study on Loess Liquefaction in Tianchuan,Qingshui county,Gansu province Induced by WenchuanMs8.0 Earthquake[J],Hydrogeology&Engineering Geology,2012,39(2):116-120.
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