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前言大爆破中,一个重要问题就是危岩、危坡的稳定,水利工程中的定向爆破筑坝,因危坡破坏常影响到工程的设计和施工,石砭峪水库在定向爆破筑坝中,三块危岩体下滑,总方量达24.7万立方米,造成施工导流隧洞的堵塞,被迫改溢洪道为溢洪洞方案,以及截水墙和防渗帷幕的改线等问题,给工程带来损失。本文介绍石砭峪边坡计算中所采用的三种方法,这些方法也为其他工程所验证,并通过几个危岩体的计算实例,对计算方法适用条件进行分析,供爆破岩坡稳定计算参考。
Foreword In the big blasting, an important issue is the stability of dangerous rock and dangerous slope. Directional blasting and damming in water conservancy project damming often affects the design and construction of the project due to the destruction of dangerous slope. In Shihanyu reservoir in directional blasting dam construction, The three dangerous rock bodies slipped with a total volume of 247,000 cubic meters, resulting in the blockage of diversion tunnels, the replacement of overflow spillway into spillway tunnel schemes, as well as the rerouting of cutoff walls and seepage curtains, To loss. This paper introduces three methods used in the calculation of Shiyu valley slope. These methods are also validated by other projects. The calculation examples of several dangerous rock mass are used to analyze the applicable conditions of the calculation method for the stability calculation of blasting rock slope reference.