论文部分内容阅读
位移突变判据是岩质边坡稳定性分析中常用的一种手段,然而目前在确定永久位移值突变点的确切位置方面存在着较大的人为主观因素,并且缺乏合理的数学公式来支持。针对这一现状,本文采用指数函数对地震永久位移与强度折减系数的关系曲线进行拟合,然后通过坐标系转换的方式,结合数学理论公式推导获取了永久位移值突变点在关系曲线中的位置,并使用该方法对各级烈度地震作用下岩质边坡的动力稳定性规律进行研究,取得了较好的结果。最后将本文方法应用于汶川地震区岩质边坡实例研究中,稳定性计算结果与现场地质调查情况相符,验证了本文方法的工程实用性。
Displacement mutation criterion is a commonly used method in rock slope stability analysis. However, there is a large subjective human factor in determining the exact position of the point of abrupt displacement displacement, and there is no reasonable mathematical formula to support it. In view of this situation, this paper uses the exponential function to fit the curve of the relationship between the permanent displacement and the strength reduction coefficient of the earthquake, and then deduces and obtains the relationship between the permanent displacement displacement point and the displacement curve through the coordinate system transformation and the mathematical formula This method is used to study the dynamic stability of rock slope under various earthquake intensity and achieve good results. Finally, the method is applied to the case study of rock slope in Wenchuan earthquake area. The results of stability calculation are consistent with the field geological survey, which verifies the engineering practicability of this method.