重庆缙云山不同林地类型土壤的抗剪强度研究  

Soil Shear Strength of Different Forest Types in Jinyun Mountain in Chongqing City

作　　者：齐娜[1] 王玉杰[1] 张心平[2,3] 成晨[1] 杨晓梅[1] 储小院[1] 

机构地区：[1]北京林业大学水土保持学院水土保持与荒漠化防治教育部重点实验室,北京100086 [2]中国农业大学 [3]中国农业大学水利与土木工程学院,北京100086

出　　处：《安徽农业科学》2010年第6期3238-3240,共3页Journal of Anhui Agricultural Sciences

基　　金："十一五"林业科技支撑计划项目(2006BAD03A1802)

摘　　要：采用三轴压缩试验方法研究重庆缙云山5种林地类型土壤的应力-应变关系及强度特性,探讨影响土壤抗剪强度的指标和主要因素。结果表明,非饱和条件下,各林地土壤的抗剪强度τf与法向正压力σ的关系符合库仑定律。缙云山各林地土壤抗剪强度包线呈斜直线;同一林地类型不同层次土壤抗剪强度大小主要与其黏聚力相关;不同林地类型同一层次土壤抗剪强度大小受含水率、土壤结构多种因素的综合影响。In order to explore the impact of soil shear strength indicators and the main factors,stress-strain relationship and strength characteristics of five kinds of forest soil were studied by triaxial compression test in Jinyun Mountain,Chongqing.The results indicated that the soil shear strength and normal pressure on the relationship was consistent with Coulomb＇s law in the non-saturated conditions.Its shear strength envelope was oblique straight line.At different levels of soil shear strength of the size of the main cohesive force associated with its sticky force in the same forest types.Soil shear strength at the same level of different forest types was affected by moisture content and soil structure.

关 键 词：三轴压缩实验 土壤抗剪强度 非饱和土 缙云山 

分 类 号：S714[农业科学—林学]