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一、概述由三组地质结构面相互切割组成的岩石四面体(图1),系属稳定分析范畴中具有典型意义的岩体,因为它不仅包括了沿某一组结构而滑动的情况,同时还包括了沿二组结构面相交棱线滑动的情况,集各种岩体可能滑动类型的大成。笔者在前一篇文章[1]中,业已详尽介绍了用于分析三向岩体稳定性的赤平投影图解法,本文提出的数值计算——图解法,概念上与亦平法相类似,但图解的绘制不再单纯依靠作图手段,而是另辟计算途径。概括地说,实施这一方法的要点,先是根据岩体几何特性及作用力特性求出规定座标系统中各控制点的座标,然后籍连接有关控制点完成图解工作。有了图解以后,只需在图解上定出作
I. Overview The tetrahedra (Figure 1), consisting of three groups of geologic structural planes that are cut from one another, belong to the typical rock mass of the stable analysis category because it not only includes the case of sliding along a set of structures, Also included along the intersection of the two sets of structures intersecting the edge of the case of ridge, set all kinds of rock mass likely to slide type. In the previous article [1], the author has described in detail the stereographic projection method used to analyze the stability of three-dimensional rock mass. The numerical calculation-graphic method proposed in this paper is similar in concept to that of the flat method. However, Drawing no longer rely solely on mapping tools, but another way to calculate. In a nutshell, the key point of implementing this method is to find out the coordinates of each control point in the specified coordinate system according to the geometrical characteristics and force characteristics of the rock mass, and then connect the relevant control points to complete the graphic work. With the diagram later, just set the diagram for the work