土壤含水量和植被对浅层滑坡土体抗剪强度的影响  

Impacts of Soil Moisture Content and Vegetation on Shear Strength of Soil in Surface Landslide

作　　者：杨永红[1] 刘淑珍[2] 王成华[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]中国科学院成都山地灾害与环境研究所,四川成都610041

出　　处：《灾害学》2006年第2期50-54,共5页Journal of Catastrophology

基　　金：国家重大基础项目前期研究专项(2004CCAO3600)资助

摘　　要：通过对裸地和桉树林地两种土壤在不同土壤含水量、不同深度的非饱和土的直剪试验,研究了植被类型和含水量对非饱和土抗剪强度的影响。结果表明,随着含水量的增加,非饱和土的粘聚力和内摩擦角均减小,粘聚力有较大变化而内摩擦角变化较小,植被具有提高非饱和土抗剪强度的作用。The authors analyze the impacts of vegetation type and soil moisture content on shear strength of unsaturated soil through direct shearing tests for various vegetation types, different soil moisture contents and different-depth unsaturated soil. The results show that the cohesion of unsaturated soil changes greatly and the friction angle changes a little with soil moisture content. It is also shown that vegetation can improve shear strength of unsaturated soil, which therefore provides a basis that vegetation can reinforce soil and protect slopes.

关 键 词：浅层滑坡 含水量 非饱和土 植被 抗剪强度 

分 类 号：TU432[建筑科学—岩土工程] P642.22[建筑科学—土工工程]