水工高陡岩质边坡微震损伤效应及其失稳机理研究

项目名称： 水工高陡岩质边坡微震损伤效应及其失稳机理研究

项目编号： No.51209127

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 水利科学与海洋工程学科

项目作者： 徐奴文

作者单位： 山东大学

项目金额： 25万元

中文摘要： 随着我国西电东送、南水北调等大型能源工程的不断开发建设，开挖扰动作用下的高陡岩质边坡稳定性问题将日益突出。本课题以正在施工中的四川省大渡河大岗山水电站右岸边坡为研究背景，该边坡自然高度在600 m以上，开挖坡高达400 m之巨，通过对开挖扰动下岩质边坡的现场微震监测、理论分析以及数值模拟试验等手段，深入研究高陡岩质边坡在开挖、固结灌浆、加固措施和大坝蓄水及库水位骤升骤降等作用下其内部岩石微破裂萌生、发育、扩展、贯通与相互作用诱致边坡宏观的可能失稳破坏模式与机理，以及特殊的处理措施；提出一套适用于西部水电站开挖扰动作用下高陡岩质边坡稳定性评价机制与灾害预警设计方法，对于西部大型水电枢纽工程的高边坡安全运营具有重要的理论意义和工程应用价值。

中文关键词： 岩质边坡；微震监测；数值分析；稳定性；开挖扰动

英文摘要： The issue on stability of high steep rock slopes subjected with excavation disturbance is increasingly highlighted, with the continuous exploitation and construction of some large-scale energy source projects such as the West-East power transmission and the South-North water transfer project. The right bank slope of Dagangshan hydropower station along Dadu River in Sichuan province is regarded as the research background in this study. The natural height of the rock slope is more than 600 m and the excavation height is over 400 m. Different approaches such as on-site microseismic monitoring, theoretical analysis and numerical simulation are adopted to analyze the stability of the rock slope subjected with excavation disturbance. The macroscopical potential failure modes and mechanism of slope induced by the initiation, growth, extension, coalescence and interaction of microfractures inside rockmass subjected with continuous excavation, consolidation grouting, reinforcement measures, impoundment of the dam and dramatic rise and decline of water level etc are in-depth analyzed,as well as some special measures. Stability assessment mechanism and hazard forecasting design procedures of high steep rock slope in hydropower stations in the west of China subjected with excavation disturbance are thus put forward, which p

英文关键词： Rock slope；Microseismic monitoring；Numerical analysis；Stability；Excavation disturbance