摘要
通过对裸地、扭黄茅草地、车桑子灌木林地和桉树林地四种不同植被类型、不同深度土壤在天然含水量情况下的直剪试验,研究了植被类型对非饱和土抗剪强度的影响。结果表明,植被具有提高非饱和土抗剪强度的作用,黏聚力增加较大,内摩擦角增加相对较小;土层越深,土壤抗剪强度提高的程度越小。
It is analyzed that the impacts of vegetation type 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, tanglehead grassplot, switch sorrel shrubbery and eucalyptus holt under natural moisture contents. 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 the deeper of soil layer,the smaller of the extent of shearing strength improved.
出处
《水土保持研究》
CSCD
北大核心
2007年第2期233-235,共3页
Research of Soil and Water Conservation
基金
重大基础项目前期研究(2004CCAO3600)
关键词
根系
非饱和土
植被
抗剪强度
root system
unsaturated soils vegetation
shear strength
