安阳膨胀土的结构屈服压力与结构强度的关系  

Relationship between Structural Strength and Structural Yield Pressure of Expansive Soil

作　　者：高春华[1] 

机构地区：[1]安阳师范学院建筑工程学院,河南安阳455000

出　　处：《建筑科学》2010年第7期10-12,25,共4页Building Science

基　　金：河南省教育厅自然科学基金资助(2009B130001);河南省政府决策研究基金资助(B555);安阳师范学院青年骨干教师基金资助

摘　　要：通过高压固结试验,采用三种不同的数据处理方法求取膨胀土的结构屈服压力;通过直剪试验获得膨胀土的结构强度,并分析其与结构屈服压力的关系。结果表明:随着含水量的降低,结构屈服压力的增量要比结构强度的增量快;结构强度增量同结构屈服压力增量均呈线性相关关系;在施加正应力和剪应力的共同作用下,膨胀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。On the basis of high pressure consolidated tests,the structural yield pressure of expansive soil 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 shows that the increment of structural yield pressure is larger than that of the structural strength along with the reducing of moisture content,there is a linear relationship between the two increments of the structural strength and the structural yield pressure,and under the coactions of normal stress and horizontal shear stress,the structure of expansive soil is beginning to failure before the normal stress reaches the structural yield pressure.

关 键 词：原状膨胀土 结构强度 结构屈服压力 

分 类 号：TU43[建筑科学—岩土工程] TU411.7[建筑科学—土工工程]