小湾水电工程6#山梁节理岩体高边坡3DEC分析  

3DEC analysis on 6# high rock slope with joints in Xiaowan Hydropower Project

作　　者：汤明高[1] 许强[1] 黄润秋[1] 严明[1] 

机构地区：[1]成都理工大学环境与土木工程学院,成都610059

出　　处：《水文地质工程地质》2006年第3期57-60,共4页Hydrogeology & Engineering Geology

摘　　要：小湾水电工程6#山梁区布置有高线、上线和低线三层公路。在高线公路开挖期间,6#山梁上部发生了局部滑塌。大量野外地质调查结果显示小湾水电工程6#山梁主要发育两组节理(陡倾坡外与缓倾坡外),并且6#山梁的变形破坏和发展演化将主要受这两组节理的控制。为了明确6#山梁的变形破坏机制,建立了6#山梁的3DEC模型,开展了6#山梁节理岩体高边坡在静态荷载下的反应以及变形破坏的全过程模拟,得出6#山梁高边坡的变形主要是结构面的剪切滑移造成的,其将会继续沿着节理面发生累进性变形,坡体应力会逐步调整,将有可能沿着1 100m高程左右的潜在剪出口发生整体变形破坏,最后提出了剪出口部位应作重点支护的建议。There are three roads, high routine road, up routine road and down routine road on 6 # high rock slope zone in Xiaowan Hydropower Project on Lancang River of Yunnan Province. The part of slope happened to slide when digging high routine road. Investigations show that there are two groups of joints in the 6 # high rock slope, and 6 # slope＇s deformation is depended on them. In order to understand the deformation failure mechanics, the authors build 3DEC model of 6 # slope. Through analysis, following conclusions are drawn： the deformation comes from the shear deformation among joints and then stresses re-distribute. At last deformation will increase and may happen to slide along front shear fracture lying in elevation of 1 100m of 6 # high slope. Then we gave the suggestion of key support on cutting crack position.

关 键 词：节理岩体 3DEC 剪切变形 变形演化过程 

分 类 号：P642.22[天文地球—工程地质学] TU457[天文地球—地质矿产勘探]