含水率对合肥地区膨胀土抗剪强度的影响

Influence of moisture content on shear strength of expansive soil in Hefei area

为研究不同含水率情况下膨胀土抗剪强度、粘聚力和内摩擦角的变化趋势,以合肥地区膨胀土为研究对象,采用全自动残余强度试验仪对5组不同含水率的膨胀土试样进行直剪试验,试验结果表明:随着含水率的增加,膨胀土的抗剪强度、粘聚力和内摩擦角均随之减小,且含水率与粘聚力和内摩擦角呈线性关系。

In order to study the change trend of shear strength, cohesion and internal friction angle of expansive soil under different water content, the expansive soil in Hefei area was taken as the research object, and the five groups of different water content of the expansive soil samples were subjected to direct shear test by using automatic residual strength tester. The test results show that with the increase of water content, the shear strength, cohesion and internal friction angle of the expansive soil are reduced and that the water content is linear with cohesion and internal friction angle.