三峡库区董家湾高切边坡稳定性赤平投影解析

Analysis on Stereographic Projection of High Cut Slope Stability in Dongjiawan of Three Gorges Reservoir Areas

岩质边坡的稳定性主要受结构面的控制和影响,因此,了解边坡中各结构面的相互关系是进行稳定性评价的前提。赤平极射投影可将三维空间内的几何要素投影到平面上进行研究,用它来解析岩质边坡的稳定性具有独特的优势。基于此,文中介绍了赤平投影的基本原理和使用方法,对三峡库区一典型岩质高切边坡的稳定性进行了分析和评价,满足了工程的要求。

Rock slope stability is mainly subject to structural surface. Therefore, it is a precondition to understand the interrelation of slope structural surfaces for stability analysis. Stereographic projection can project geometric factors in three-dimensional space onto a plane for study, which has unique advantages in analysis of rock slope stability. For this, this paper introduces the basic principle and usage of stereographic projection and carries out analysis and evaluation of a typical high cut slope stability in Three Gorges Reservoir areas, which satisfies engineering requirement.