土体内聚力随含水量、粘粒含量及干密度变化关系探讨

Discussion on the cohesion of soil changing with water content, cohesive soil content and dry density

在室内试验条件下,改变土体含水量、粘粒含量及压实度等物性参数,分析了土体内聚力随土体含水量与粘粒含量比值m及土体干密度ρd变化关系。结果表明,土体内聚力C随土体含水量与土体粘粒含量比值m的增大,总体上呈减小趋势。当比值m≥1 33时,内聚力C随m的增大变化已不明显,其值小于5 0kPa(少数小于10 0kPa);当m<1 33时,土体内聚力C随m的增大具有明显的线性降低趋势。

We conducted the experiment in the laboratory to study the changes of the soil cohesion (C) with the ratio of water content and cohesive soil content (m) and dry density (ρ_d). The results show that the soil cohesion decreases with the increasing of cohesive soil content. When m ≥ 1.33, C does not change much with the increasing of m, and its value is less than 5.0kPa (some less than 10.0kPa). When m <1.33, C decreases linearly with the increase of m. When 1.0<m<1.2, C is stagnant with the change of m. When m<0.8, C increases with the decrease of m sharply.