三峡库区典型顺向岸坡库水与降雨联合作用失稳观测与理论解析

项目名称： 三峡库区典型顺向岸坡库水与降雨联合作用失稳观测与理论解析

项目编号： No.41272306

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 简文星

作者单位： 中国地质大学（武汉）

项目金额： 80万元

中文摘要： 采用野外调研与三维激光扫描等方法，研究三峡库区典型顺向岸坡在库水与降雨联合作用下变形破坏特征，建立典型顺向岸坡变形破坏的地质模型。使用扫描电镜、X粉晶衍射与红外光谱分析等研究消落带软弱岩层与关键岩层面结构、构造与物质成分的变化规律；考虑水的浸泡与库水位升降作用，对消落带软弱岩层与关键岩层面进行剪切实验，探讨消落带软弱岩层与关键岩层面抗剪强度弱化机理。对典型顺向岸坡降雨入渗、地下水位、应力与位移进行系统的实时监测，再结合人工降雨模拟试验、渗透试验与水分特征曲线试验，探讨顺向岸坡降雨入渗过程与地下水运动特征，建立库水与降雨联合作用下降雨入渗数学模型与裂隙岩体渗流－应力耦合数学模型。在现有国际通用软件的基础上研发库水与降雨联合诱发作用的数值模拟软件，对三峡库区顺向岸坡进行客观真实的数值模拟，揭示三峡库区顺向岸坡在库水与降雨联合作用下的失稳致灾机理与过程，为顺向岸坡失稳防灾减灾提供科学理论依据。

中文关键词： 三峡库区；顺向岸坡；库水与降雨联合作用；实时监测；失稳机理与过程

英文摘要： In order to establish the geological models of deformation and failure of the typical translational bank slopes in the Three Gorges Reservior, the deformation and failure characteristics of these bank slopes triggered by the combining effect of reservoir water and rainfall are studied in detail with field investigation and ILRIS-HD-ER laser scanner methods, and so on. The main mineral components and the microstructure changes of the incompetent beds and important bedding surfaces within the water level variation zone under the combining effect of reservoir water and rainfall are observed and anaylsed with the methods of scanning electron micrograph, X-ray diffraction analysis and infrared ray analysis. Considering the combining effect of reservoir water and rainfall, shear tests are conducted on the incompetent beds and important bedding surfaces within the water level variation zone to research the softening mechanism of the shear strength. In order to study the rainfall infiltration process and the characteristics of underground water flow, the rainfall infiltration, underground water table, stress and displacement of the typical translational bank slopes are monitored using real-time monitoring system. Artificial rainfall tests, permeability tests and soil-water characteristic curve tests are performed on the

英文关键词： Three Gorges Reservoir；translational bank slopes；combining effect of reservoir water and rainfall；real time monitoring；failure mechanism and process