粉质黏土灵敏度的结构性及定量化研究应用
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摘要
根据应力灵敏度与应变灵敏度的定义,以太原地区的粉质黏土为研究对象,通过室内无侧限抗压强度试验,进行不同饱和度土体灵敏度测试;并且分析两种灵敏度曲线。研究结果表明在不同饱和度下,有峰值点的应变灵敏度曲线能直观的反映出原状土体破坏时的结构特征,以及确定原状土体破坏时的应变值。而应力灵敏度曲线则是单调上升且无峰值点,在图中不能准确的确定出土体破坏时的压力值。通过比较分析两种曲线图,得出应变灵敏度在表征土体本构关系中要比应力灵敏度更有优越性。
Based on the definition of stress sensitivity and strain sensitivity of silty clay in Taiyuan area,different saturation soil sensitivity without side limit compressive strength were test through the indoor test,and analysis of two kinds of sensitivity curve. Research results show that under different saturation,a peak point of strain sensitivity curve can directly reflect the original state when the damage of soil structure characteristics and to determine the strain value of undisturbed soil is destroyed. And the curve of stress sensitivity is monotonically and no peak point in the picture can't accurate determine soil damage when the pressure value. Through comparative analysis of two kinds of graph obtained strain sensitivity in the characterization of the constitutive relation of soil stress sensitivity is more than its advantage.
Based on the definition of stress sensitivity and strain sensitivity of silty clay in Taiyuan area,different saturation soil sensitivity without side limit compressive strength were test through the indoor test,and analysis of two kinds of sensitivity curve. Research results show that under different saturation,a peak point of strain sensitivity curve can directly reflect the original state when the damage of soil structure characteristics and to determine the strain value of undisturbed soil is destroyed. And the curve of stress sensitivity is monotonically and no peak point in the picture can't accurate determine soil damage when the pressure value. Through comparative analysis of two kinds of graph obtained strain sensitivity in the characterization of the constitutive relation of soil stress sensitivity is more than its advantage.
引文
1 齐吉琳,谢定义,石玉成.土结构性的研究方法及现状.西北地震学报,2001;23(1):99—103Qi Jilin,Xie Dingyi,Shi Yucheng.Status and method of quantitative study on soill structure.Northwestern Seismological Journal,2001;23(1):99—103
2 谢定义,齐吉琳.土结构性及其定量化参数研究的新途径.岩土工程学报,1999;21(6):651—656Xie Dingyi,Qi Jilin.Soil structure characteris-tics and new approach.Journal of Geotechnical Engineering,1999;21(6):651—656
3 杨艳,齐吉琳,宋春霞,等.灵敏度在土结构性定量化研究中的应用.西北地震学报,2007;29(1):26—29Yang Yan,Qi Jilin,Song Chunxia,et al.Experimental study on the application of sensitivity in quantitative study of soil structure.Northwestern Seismological Journal,2007;29(1):26—29
4 冯志焱,谢定义.复杂加载条件下原状黄土结构性定量化参数变化全过程分析.西安理工大学学报,2009;25(1):72—75Feng Zhiyan,Xie Dingyi.Quantitative analysis of soil structure variations in whole process unduer complex loading conditions of intact loess.Journal of Xi'an Polytechnic University,2009;25(1):72—75
5 邓永锋,刘松玉.扰动对软土强度影响规律研究.岩石力学与工程学报,2007;26(9):1940—1944Deng Yongfeng,Liu Songyu.Effect of sample disturbance on soft soil strength.Journal of Rock Mechanics and Engineering,2007;26(9):1940—1944
6 邵生俊,周飞飞,龙吉勇.原状黄土结构性及其定量化参数研究.岩土工程学报,2004;26(4):531—536Shao Shengjun,Zhou Feifei,Long Jiyong.Structural properties of loess and its quantitative parameter.Journal of Geotechnical Engineering,2004;26(4):531—536
7 谢永涛,张鸿儒.关于“土结构性及其定量化参数研究的新途径”的讨论.岩土工程学报,2000;(4):512—513Xie Yongtao,Zhang Hongru.Research on soil structural and quantitative parameters of new ways to discuss.Journal of Geotechnical Engineering,2000;(4):512—513
2 谢定义,齐吉琳.土结构性及其定量化参数研究的新途径.岩土工程学报,1999;21(6):651—656Xie Dingyi,Qi Jilin.Soil structure characteris-tics and new approach.Journal of Geotechnical Engineering,1999;21(6):651—656
3 杨艳,齐吉琳,宋春霞,等.灵敏度在土结构性定量化研究中的应用.西北地震学报,2007;29(1):26—29Yang Yan,Qi Jilin,Song Chunxia,et al.Experimental study on the application of sensitivity in quantitative study of soil structure.Northwestern Seismological Journal,2007;29(1):26—29
4 冯志焱,谢定义.复杂加载条件下原状黄土结构性定量化参数变化全过程分析.西安理工大学学报,2009;25(1):72—75Feng Zhiyan,Xie Dingyi.Quantitative analysis of soil structure variations in whole process unduer complex loading conditions of intact loess.Journal of Xi'an Polytechnic University,2009;25(1):72—75
5 邓永锋,刘松玉.扰动对软土强度影响规律研究.岩石力学与工程学报,2007;26(9):1940—1944Deng Yongfeng,Liu Songyu.Effect of sample disturbance on soft soil strength.Journal of Rock Mechanics and Engineering,2007;26(9):1940—1944
6 邵生俊,周飞飞,龙吉勇.原状黄土结构性及其定量化参数研究.岩土工程学报,2004;26(4):531—536Shao Shengjun,Zhou Feifei,Long Jiyong.Structural properties of loess and its quantitative parameter.Journal of Geotechnical Engineering,2004;26(4):531—536
7 谢永涛,张鸿儒.关于“土结构性及其定量化参数研究的新途径”的讨论.岩土工程学报,2000;(4):512—513Xie Yongtao,Zhang Hongru.Research on soil structural and quantitative parameters of new ways to discuss.Journal of Geotechnical Engineering,2000;(4):512—513
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