岩体结构稳定分析原理和方法

工程实践表明,在边坡、地基或地下工程岩体中几组地质结构面和临空面的组合往往构成可能失稳的岩石结构体、存在向临空面运动的可能性、影响到工程岩体的稳定性。这时必须针对这种可能失稳的结构体进行分析,采取必要的加固或处理。关于岩石结构体的稳定分析,文献中已有一些报导,但偏重于图解和计算方法、一般是针对特定单一块体的解析,仅应用于边坡工程。

ON THE STABILITY ANALYSIS OF ROCK MASS STRUCTURES

This paper deals with the principles and method for stability analysis of structural blocks in the rock mass. The relative motions of structural blocks in many eases are responsible for the major failure of rock mass. But the block movement involves numerous mechanisms such as collapse, slide, rotation, toppling and so on. Moreover, the rock mass is usually intersected by large amount of geologic discontinuities, forming many unstable blocks with complex distribution. Thus, the stability analysis becomes quite complicated. The method developed in this paper is based upon’ the use of vector analysis and computer technique, that enables us to automatically complete the whole stability analysis including the procession of original geological data, the determination of boundary surfaces and positions of unstable blocks, the kinematic tests and calculation of factors of stability. Finally, a general-purpose computer program is proposed for solving such problems as rock slopes, tunnels and large underground excavations.