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对人工开挖边坡的长期稳定性问题进行了一系列的室内三轴剪切试验 ,探讨了黏性土在浸水后的强度降低程度 ,以及强度指标的变化情况 ,模拟了降雨和地下水位变动时土中的应力状态变化过程 ,得出了人工切土边坡由于水的浸入、长期地质风化、扰动等因素 ,使有效黏聚力几乎降低为零 ,有效内摩擦角和正常固结状态的接近 ,并通过工程实例用有效应力法和总应力法对边坡稳定性进行了分析验证 ,为人工切土边坡的长期稳定性计算和强度参数确定提供简便、实用和经济的方法。
A series of laboratory triaxial shear tests were carried out on the long-term stability of artificial excavated slopes. The degree of strength reduction and the change of strength index of cohesive soils after flooding were discussed, and the variation of rainfall and groundwater level The results show that the effective cohesion is almost reduced to zero due to the infiltration of water, long-term geological weathering and disturbance, and the effective internal friction angle and normal consolidation state Approached and verified the stability of the slope by the effective stress method and the total stress method through the engineering example. It provides a simple, practical and economical method for the calculation of the long-term stability and the determination of the strength parameters of the artificial cut slope.