边坡临界滑面三点定弧全局逐点搜寻方法

圆弧型滑坡是自然界中常见的一种破坏模式。在进行此类边坡稳定性分析中，寻找临界滑面都是以圆弧的圆心坐标和半径作为安全系数的自变量，因岩土体边坡的多峰值性，以这类自变量寻找临界滑面容易形成局部优化，达不到全局优化的目标。为了避免这个缺点，提出以滑体的张裂面、滑体的出口以及滑弧的弓形高作为寻找临界滑面的自变量。由于此3个自变量在滑坡中各有其自身的工程含义，在稳定性分析过程中，3个自变量的变化范围可随工程需要、地质特性、边坡形状等任意给定，分析方便、直观，从而实行了全局逐点搜寻，解决了岩土体边坡多峰值优化问题。

The Global Searching Method on Three Points Determining the Arc for Slope Critical Sliding Face

The circular sliding slope is a kind of usual destroying mode in nature.To analyze on the stability of this kind of slope，it is usual that the center coordinates and its radius of a circular arc are determined as the independent values of safety factors to find out the critical slide face.However，since there are many peak values in rock slope，this method can easily optimize the part of slope，but not the whole one.To avoid this flaw，the research uses the fracture plane and exist side of sliding rock-mass，and the height of the sliding arc to determine the independent values of the critical sliding face.Because the three values have its own meaning of engineering in sliding slope，the variation range of the three values can be adjusted according to the project necessity，the geological characteristics and the slope shapes to easily and directly analyze the slope stability.By this way，the global searching is realized，which solves the problems in optimizing the slide slopes with many peak values.