黄土的结构强度及其与结构屈服压力的关系

通过高压固结试验,分别采用三种不同的数据处理方法求取黄土的结构屈服压力;通过直剪试验获得黄土的结构强度,并分析其与结构屈服压力的关系。结果表明:随着含水率的降低,结构屈服压力的增量要大于结构强度;结构强度增量同结构屈服压力增量呈线性相关关系;在施加正应力和水平剪应力的共同作用下,黄土的结构在正应力还没有达到结构屈服压力时就开始出现破坏。

Relationship between structural strength and structural yield pressure of loess

Through high pressure consolidated tests,the structural yield pressure of loess was obtained by three different methods of data processing,and the structural strength was determined by direct shear tests.Analysis of the relationship between the structural strength and the structural yield pressure,showed that the increment of structural yield pressure was larger than that of the structural strength along with the reducing of moisture content,there was a linear relationship between the increment of the structural strength and the structural yield pressure,and under the coaction of normal stress and horizontal shear stress,the structure of loess was beginning to failure before the normal stress reached the structural yield pressure.