基于赤平极射投影法的岩质边坡破坏模式预测

以苗家坝水电站右坝肩岩质边坡的测绘为例,引入赤平极射投影的方法,基于优势结构面和其他随机结构面的特征和现场调查研究成果,深入分析了边坡自然状态下的变形破坏模式和地质历史演变过程,进而对开挖工程边坡可能出现的主要变形破坏模式进行了预测,得出了右坝肩边坡的主要变形破坏模式、形成机理及发生可能性和规模。这种方法不仅考虑到了结构面的空间组合关系、结构面的成因和性质,同时也考虑了边坡变形破坏模式出现的地质演变过程,一定程度上从时空观的角度分析边坡的变形破坏模式,就工程本身而言,更有实际意义,是边坡变形破坏模式研究的一种综合思路。

Prediction based on the stereographic projection principlefor rock slope failure modes

Taking right dam abutment slope of Miaojiaba hydropower station as an example, Studying the failure modes of the abutment slopes in natural status and their geological evolving process,and with the results from the above study predicting the failure modes of the abutment engineering slopes. All those two works being done by using stereographic projection method and based on the characterization of prominent discontinuities and random discontinuities. Such doing concerns not only interrelations, formation causes and characteristics of discontinuities, but also geological evolving process of failure modes,which presents synthetical thinking on the study of slope failure modes.