含根量与土壤抗剪强度增加值关系的试验研究  

Experimental Research on the Relation Between Increasing Value of Shearing Strength with Root System

作　　者：杨永红[1] 刘淑珍[2] 王成华[2] 肖清华[3] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家专业实验室,成都610059 [2]中国科学院成都山地灾害与环境研究所,成都610041 [3]西南交通大学土木工程学院,成都610031

出　　处：《水土保持研究》2007年第3期287-288,291,共3页Research of Soil and Water Conservation

摘　　要：通过对裸地、车桑子灌木林地不同深度土壤在天然含水量情况下的直剪试验,及对车桑子根系沿垂直方向的分布情况的调查,研究了含根量对非饱和土抗剪强度的影响。结果表明,植物根系具有提高非饱和土抗剪强度的作用,含根量沿垂直方向呈指数函数规律分布,黏聚力和内摩擦角沿垂直方向的增加值均与含根量成正相关关系。It is analyzed that the impacts of root weight on shear strength of unsaturated soil through direct shearing tests for unsaturated soil of different depth and various vegetation types which consist of bare soil and switch sorrel shrubbery under natural moisture contents and through the investigation of root system distributing along vertical profile. The results show that root system can increase shearing strength of unsaturated soil and that root weight is distributing according to exponential function. It is also shown that the relationship between root system and increasing value of friction angle and cohesion along vertical profile is positive relative.

关 键 词：含根量 非饱和土 根系 抗剪强度 

分 类 号：TU432[建筑科学—岩土工程] S157.1[建筑科学—土工工程]