【作者】 张小宝；

【导师】 葛克水； 刘振军；

【作者基本信息】 中国地质大学（北京） ， 地质工程， 2006， 硕士

【摘要】 水库库岸稳定性问题是人类工程活动改变地质体的地质环境而产生的重大工程地质问题之一,近年来,人们已经做了很多这方面的研究。库岸滑坡不仅危机到大坝的安全,而且对电站运行的经济效益有着重大的影响。近年来随着国家水电事业的快速发展,水库库岸滑坡越来越引起人们的重视。 位于澜沧江上游的大华桥水电站坝前右岸的大华滑坡体勘探资料详尽,监测资料全面、连续。其稳定性的研究不仅对于该水电站的正常运营意义重大,而且对我国其它在建、拟建水电站库岸滑坡研究也有重要参考价值。 本文按照“地质机制分析-稳定性评价-数值模拟分析-结论-治理建议”的方法体系,研究了大华滑坡体在水库蓄水前后稳定性。首先,在现场调研的基础上,仔细分析了大量有关大华滑坡体的勘察资料和监测资料,并查阅了相关资料,从地形地貌、地层岩性、水文地质、地震、人工活动等因素上进行了归纳总结。据此,对大华滑坡体做了比较深入的地质机制分析,查清了大华滑坡地质成因和滑动机制,用两种不同的刚体极限平衡法对大华滑坡蓄水前后几种不同工况下的稳定性进行了计算,建立了 FLAC3D 模型,用以研究大华滑坡在水库蓄水后其形变场的特点,较好地再现了监测所揭示的蠕滑体变形规律。进一步讨论了大华滑坡体在水库蓄水前后以及正常运行时的稳定性问题。在综合分析大华滑坡地质成因、滑动机理的基础上,针对大华滑体的特性,本文提出了经济合理可行的治理建议。更多还原

【Abstract】 The bank landslide of reservoir is a most important engineering geological problem thatcome into being with the hydropower Station being constructed. Lots of studies have beendone during past years. The landslides of reservoir are not only dangerous to hydropowerStation, but also affect the economic benefit of the hydropower station. As the developingquickly of hydropower, the importance of the landslides of reservoir is being more realized bypeople. The landslide of DaHua locates the upriver right bank of the Da Hua Bridge hydropowerstation which is situated the upriver of the LanCangJiang river. The reconnaissance data andmonitor data about the landslide of DaHua are detailed. The study of its stability not only isvery important for this reservoir running but also can be referred to for others bank landslidesof constructing and proposed hydropower Station. According to the method and system of study landslide: "from geological mechanismanalysis and stability evaluation and numerical simulation analysis and conclusion to methodsof dealing with", this dissertation has researched the stability of the DaHua landslide beforeand after the reservoir storing water. Firstly, Based on the investigation of spot and analysis of amounts of data of explorationand monitor about landslide of DaHua and lots of documents being referred, the dissertationsummarizes the characteristics and mechanism from terrain physiognomy and stratum lithologyand hydrogeology and earthquake and manpower activity etc. Hereby, this paper carries outgeological analysis deeply and find out the geological reason and slippage mechanism ofDaHua landslide. Using two different rigid body margin equity, this paper analyses the stabilityof DaHua landslide after different conditions before and after storing water. The dissertationestablishes three-dimension-FLAC model to research characteristics of deformation field. Thedeformation law that was revealed by monitor data is reappeared. It also evaluates the stabilityof the DaHua landslide before and after the reservoir storing water. Through analyzing the geological reason and slippage mechanism of DaHua landslide, inallusion to the characteristics of DaHua landslide, the dissertation gives some economical andreasonable suggestion on how to deal with the DaHua landslide.更多还原