红粘土抗剪强度的水敏性研究

为了研究红粘土的地域性特征及红粘土抗剪强度的水敏性,以广梧高速云浮段红粘土为试样,进行一系列基础试验,并绕过量测基质吸力,采用考虑不同含水率的变化研究其抗剪强度水敏性.试验结果表明,该红粘土具有高含水率、高液限、高塑性、缩胀性、裂隙性、高孔隙比、低压缩性和"假粉性"等特点;红粘土应力-应变曲线为强化型曲线,高含水率和低...

Water-Sensitive Properties of Shearing Strength of Red Clay

To research the regional characteristic and the water-sensitive shear strength of red clay, a series experiments which based on the sample of the red clay located in the Guangdong Yunfu region were done in this article, and the rule of the water-sensitive shear strength was discovered by considering the change of the moisture content directly without measuring the matric suction. The results showed that: The red clay has high moisture content, high liquid limit, high plasticity, contraction dilation, fracture property, high porosity ratio, low compression, and \"pseudo-powder\", etc; Red clay stress-strain curve is the enhanced curve, and there is a large difference between high and low moisture content at shear strength, the shear strength increase with the moisture content decrease. Cohesion with the increase in moisture content, showing a first-order exponential decay, while internal friction angle showing the characteristics of sub-functions; It comes the concept of \"shear strength surface on critical moisture content\" through the water sensitivity test results, and it can be determined that whether the soil reaches the shear strength through a recognition process based on known overlying pressure and wet-dry state of the clay, and this can provide a reference for practical engineering.