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通过常规指标对土体抗拉强度的评价,建立土体单轴拉伸破坏准则,利用自主研发的新型单轴拉伸测试系统对压实粘土开展了试验研究,并从两个层面建立了粘性土抗拉强度的表达式。研究结果表明,随着压实度的增加,抗拉强度线性增加;随着含水率的增加,抗拉强度先增加后减小。抗拉强度与粘聚力之间大致呈现线性关系,所建立的拉伸破坏准则可以较好的对土体抗拉强度进行评价。
Through the evaluation of the tensile strength of the soil by conventional indicators, the failure criterion of uniaxial tension of the soil was established, and a new uniaxial tensile test system developed by ourselves was used to study the compaction of clay. The viscosity of the clay was established from two aspects Soil tensile strength expression. The results show that as the degree of compaction increases, the tensile strength increases linearly; with the increase of water content, the tensile strength first increases and then decreases. Tensile strength and cohesion generally linear relationship between the established tensile failure criterion can better soil tensile strength evaluation.