广西靖西红粘土的变形和强度特性研究  

DEFORMATION AND SHEAR STRENGTH OF LATERITE CLAYS IN JINGXI,GUANGXI PROVINCE

作　　者：王英辉[1] 聂庆科[1] 张全秀[1] 梁书奇[1] 

机构地区：[1]河北建设勘察研究院有限公司,石家庄050031

出　　处：《工程地质学报》2009年第4期550-556,共7页Journal of Engineering Geology

摘　　要：对广西靖西取得的3种红粘土原状土样以及室内制备的重塑土样进行单轴压缩试验和三轴剪切试验(包括浸水饱和后的试验),其目的是研究静力荷载作用下红粘土的固结变形和强度特征。研究表明,在较大的压缩应力作用下,土样仍有较大的孔隙比;红粘土的破坏面为一个曲面变化形态,试样首先沿较为软弱的不规则面发生,然后才形成贯通的滑动面;尽管土样在破坏时出现明显的剪切破坏面(表现为一定的脆性破坏特征),但其应力应变关系呈现应变硬化的特点,表明红粘土有很强的粘滞特性。This paper investigates the characteristics of the deformation and shear strength of laterite clay. Three kinds of laterite clays in Jingxi, Guangxi Province are studied with laboratory tests including compression tests and triaixal shear tests. The samples are undisturbed or remolded specimens. They are either saturated or unsaturated. The studies show that at a greater consolidation pressure, the void ratio of samples after compression is still very great; and the failure surface under triaixal shear condition takes on a complicated shape （ i. e. , not a plane sur- face ）. Although an obvious failure surface （ i. e. , showing a brittle failure characteristics ） takes place, the stress - strain curve takes on a hardening characteristics, which reflects the viscosity of laterite clay.

关 键 词：红粘土 变形 强度 室内试验 

分 类 号：P642.114[天文地球—工程地质学]