论文部分内容阅读
边坡抗滑稳定分析一直都是岩土力学与工程中的重要研究方向之一,研究成果众多。针对规范不平衡推力法在实际工程应用中的不合理现象,根据边坡抗滑稳定矢量和分析方法原理,提出了基于矢量分析的边坡矢量下滑推力计算方法,推导了二维及三维边坡强度储备型和超载储备型矢量下滑推力表达式。采用矢量分析方法计算了两个二维算例及一个三维算例的下滑推力,二维算例结果表明:矢量下滑推力方向受滑面倾角变化影响较剩余下滑推力小,矢量下滑推力在滑面不同位置处的变化比剩余下滑推力光滑,避免了剩余下滑推力精度受折线形滑面倾角变化影响过大的问题,当滑面为单折线时矢量下滑推力与剩余下滑推力相同。三维算例结果与对边坡稳定的已有认识保持一致。最后,采用这两种方法对西部某工程滑坡的下滑推力进行了分析,计算中主要考虑3种工况,分别为自重、暴雨和地震工况。结果表明,矢量下滑推力较剩余下滑推力有很好的改善。探讨了矢量下滑推力较剩余下滑推力的进步之处。
Stability analysis of slope stability has always been one of the important research directions in geotechnical engineering and engineering, with many achievements. Aiming at the irrationality of standard unbalanced thrust method in practical engineering application, a method of slope vector sliding thrust calculation based on vector analysis is proposed according to the theory of slope anti-sliding stability vector and analysis method. Two-dimensional and three-dimensional slope Intensity reserve and overloading reserve vector sliding thrust expression. The two-dimensional examples and the three-dimensional examples of the sliding thrust were calculated by vector analysis method. The two-dimensional example results show that: the direction of the vector sliding thrust is less affected by the change of slip angle than the remaining slip thrust; The change in different positions is more smooth than the remaining sliding thrust, which avoids the problem that the precision of the remaining sliding thrust is affected too much by the change of the inclination of the poloidal sliding surface. When the sliding surface is a single folding line, the sliding force of the vector is the same as the remaining sliding thrust. The results of the three-dimensional example are consistent with the previous understanding of slope stability. Finally, using these two methods to analyze the sliding thrust of a project landslide in the western part of China, three kinds of working conditions are considered in the calculation, namely self-weight, heavy rain and earthquake conditions respectively. The results show that the vectorial slip thrust has a better improvement than the remaining slip thrust. This paper discusses the progress of the vector sliding thrust compared with the remaining sliding thrust.