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.
出处
《水土保持研究》
CSCD
北大核心
2007年第3期287-288,291,共3页
Research of Soil and Water Conservation
关键词
含根量
非饱和土
根系
抗剪强度
root weight
unsaturated soil
root system
shear strengh
作者简介
杨永红（1973-），男，博士后，研究方向：地质灾害防治。
