粉质粘土灵敏度的结构性及定量化研究应用

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.

Structural and Quantitative Research Application of the Sensitivity of Silty Clay

_{: According to the definition of stress sensitivity and strain sensitivity of silty clay in Taiyuan area as the research object,through the indoor test of different saturation soil sensitivity without side limit compressive strength 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 ofundisturbed 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.}