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试样取自南昌非饱和红土层,室内配制了64组非饱和击实试样分别进行直接剪切试验,以研究非饱和红土含水率、干密度对抗剪强度影响规律。试验结果表明,含水率、干密度对抗剪强度及c和φ影响不呈简单的线性关系。相同干密度下,抗剪强度随着含水率的增大而减小;而在相同的含水率下,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 unsaturated red soil layer in Nanchang. 64 samples of unsaturated compacted samples were prepared for direct shear test in laboratory to study the influence of moisture content and dry density of unsaturated laterite on shear strength. The experimental results show that the moisture content and dry density have no simple linear relationship with the shear strength and c and φ. 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 internal friction angle φ and dry density The relationship is more complex.