At last, the effect of soil gradation on the shear strength of unsaturated soils is analyzed qualitatively.
最后分析了土颗粒半径差异、土体平均粒径大小对非饱和土强度的影响。
Based on testing results, the influence of water content on shear strength is analyzed; and shear strength formula of unsaturated soils is established.
根据试验结果分析含水率对非饱和土抗剪强度的影响，建立非饱和土的实用抗剪强度公式。
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