安徽农业科学2012，Vol.40Issue(9)：5534-5537,5581,5.
崩岗区岩土抗剪强度主要影响因素及衰减机理分析
Analysis of Decay Mechanism and Influence Factors of Soil Anti-shear Strength in Slope Disintegration Erosion Area
摘要
Abstract
According to the properties of red soil derived from granite in slope disintegration area and influenced significantly by wetting and drying, the variation law of anti-shear strength was analyzed under five soil wetting and drying treatments (drying 48 h, drying 24 h, natural water content, wetting 30 s, wetting 60 s) by direct shearing test. The main influencing factors of soil anti-shear strength index were studied by using gray relational method. The results showed that soil cohesive forceand internal frictional angle ψ decline with variation of drying and wetting levels; anti-shear strength is dominantly affected by crack evolution during drying period, the order of the effects of the influence factors on cohesion is plasticity index > free iron oxide > clay content, while matrix suction is the main factor for anti-shear strength decline during wetting period, the order of the effects of the influence factors on cohesion is dry density > water soluble salt > clay content.关键词
抗剪强度/黏聚力/灰色关联法/内摩擦角Key words
Anti-shear strength/ Cohesion/ Grey relational method/ Internal frictional angle分类
农业科技引用本文复制引用
张晓明,丁树文,蔡崇法,林辉..崩岗区岩土抗剪强度主要影响因素及衰减机理分析[J].安徽农业科学,2012,40(9):5534-5537,5581,5.基金项目
中央高校基本科研业务费专项(2009QC035) （2009QC035）
华中农业大学科研启动资金项目(52204-08077) （52204-08077）
“十二五”国家科技支撑计划项目(2011BAD31B00). （2011BAD31B00）
