不同压实度及含水率下重塑红土的抗剪指标研究

Study on the Shear Strength of the Red Soil under Different Compaction and Water Content

以南昌红土为研究对象,对不同压实度,不同含水率的重塑土进行了直剪试验。结果表明,压实度对土体的黏聚力影响较大,随着压实度的增加,黏聚力增大;对内摩擦角影响不明显,且不具规律性。含水率对黏聚力的影响较大,当含水率小于最优含水率时,随着含水率的增加,土体的黏聚力增加,当含水率超过最优含水率时,随着含水率的增加土体的黏聚力减少,当土体达到饱和含水率时土体的黏聚力接近为0;而随着含水率的增加内摩擦角减少。

In order to study the different degree of compaction and different water content, the direct shear test was carried out on the soil of Nanchang red clay. The results showed that the degree of compaction has a great influence on the cohesion of soil, with the increase of the degree of compaction, the cohesion increases; the inner friction angle was not obvious, and it was not regular. Water content has great influence on the cohesion, when the water content is less than the optimum water content, with the increase of moisture content, the cohesion of soil increased when the water content is more than the optimum water content, with the increase of moisture content, the cohesion decreases, the cohesion soil when the soil reaches nearly 0 saturated water content; internal friction angle decreases with the increase of water content.