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试样取自南昌地区红土层,室内配制了64组不同含水率和干密度的非饱和击实试样分别进行直接剪切试验,以研究红土在不同含水率、干密度下抗剪强度的变化规律。试验结果表明,含水率、干密度对抗剪强度及C和φ的影响不是成简单的线性关系。相同干密度下,抗剪强度随着含水率的增大而减小;而相同的含水率下,粘聚力C随着干密度的增大而增大,内摩擦角φ与干密度的关系较复杂。
The samples were taken from the red soil layer in Nanchang area. Sixty-four unsaturated compacted samples with different water content and dry density were prepared indoors for direct shear test to study the change of shear strength of laterite with different water content and dry density law. The experimental results show that the influence of moisture content and dry density on shear strength and C and φ is not a simple linear relationship. Under the same dry density, the shear strength decreases with the increase of water content. At the same moisture content, the cohesion C increases with the increase of dry density. The relationship between internal friction angle φ and dry density More complicated.