【摘要】 以重庆常见的紫色土和黄壤草本根土复合体为试验对象,研究含水率和含根量对土壤抗剪强度的影响,结果表明:①在试验含根量范围内,根系提高了土样抗剪强度,黏聚力和内摩擦角随含根量的增加而增大,但存在最优含根量区域,黄壤最优含根量为1%,紫色土最优含根量为0.6%;②在试验含水率范围内,黏聚力和内摩擦角受含水率影响显著(P<0.05),且随含水率的增加表现为先增加后减少,存在最优含水率,黄壤最优含水率为20%,紫色土最优含水率为25%;③在试验含水率范围内,含根量对紫色土黏聚力和内摩擦角的影响比黄壤大。更多还原

【Abstract】 Taking the common root-soil complex of yellow soil and purple soil of Chongqing City as the subject of test,the paper studied the influence of water content and root content to the shear strength of soil. The outcomes show that a) within the range of root content of the test,the root system has increased the shear strength of soil samples. The inner friction angle and cohesive strength are increased along with the increase of root content,but there is an optimal root content region. The optimal root content of yellow soil is 1% and 0.6% for purple soil; b)within the range of moisture content of the test,the inner friction angle and cohesive strength are remarkably affected by moisture content( P<0.05) and that are increased first then decreased along with the increase of moisture content. There is an optimal moisture content. The optimal moisture content of yellow soil is 20% and purple soil is 25% and; c) within the range of moisture content of the test,the influence of root content is greater to the inner friction angle and cohesive strength of purple soil than that of yellow soil.更多还原