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在滑坡治理工程中,由于受地形、地质条件和岩土物理力学性质复杂性的影响,以及勘察设备、技术条件等因素的限制,很难获得滑动面的精确位置。部分滑坡,虽然可以获得滑动带土的物理力学参数,但如果人为拟定的滑动面,计算稳定系数不一定最小,以致工程处理存在不安全因素。该文利用非线性GRG法,对拟合的滑动面做合理优化,得到滑动带内部稳定系数最小的滑动面。经比较,该算法稳定,优化后的滑动面与滑坡变形特征一致,可使治理方案更安全、合理、可靠。
In the landslide control project, it is difficult to get the exact position of the sliding surface due to the complexity of topography, geological conditions and the physical and mechanical properties of the rock and soil as well as the limitation of the survey equipment and technical conditions. Part of the landslide, although the physical and mechanical parameters of the sliding zone soil can be obtained, but if the man-made sliding surface, the calculation of stability coefficient is not necessarily the minimum, resulting in engineering insecurity. In this paper, the non-linear GRG method is used to optimize the fitted sliding surface to obtain the sliding surface with the minimum internal stability coefficient. After comparison, the algorithm is stable, the optimized sliding surface is consistent with the landslide deformation characteristics, and the treatment plan can be made safer, more reasonable and more reliable.