卸荷动态变化下如美水电站消力池高陡边坡三维开挖响应研究  

Three-dimensional Excavation Response Study on the High and Steep Slope of Rumei Hydropower Stilling Pool Under Unlording Dynamic Changes

作　　者：蔡健[1] 胡鹏[1] 汤天彩[1] 胡静[1] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室硕士研究生,443002

出　　处：《灾害与防治工程》2013年第1期1-8,共8页Disaster and Control Engineering

摘　　要：岩石高陡边坡是西藏如美水电站工程建设中的主要地质环境，控制着工程建设的可行性和经济效益，消力池边坡稳定性对电站安全运行影响重大。通过对坝址区地质资料的详细分析，建立消力池高陡边坡三维有限元计算模型，并结合卸荷岩体力学理论，通过弹塑性有限元法研究消力池高陡边坡在开挖过程中的动态稳定性响应。综合考虑了不卸荷，一次开挖卸荷，动态卸荷，卸荷暴雨和卸荷地震工况下，研究边坡施工期和运行期的变形、应力、塑性区大小及分布状况，对边坡稳定性进行评价，并对加固措施提出建议，研究结果对设计和施工具有较大的参考价值，对其它工程也有一定的借鉴作用。High and steep rock slopes are the major geological environment in the construction of the RuMei hydropower project in Tibet,which controls the feasibility and economic benefit of the construction,and the stability of the stilling pool slope has great influence on the safe operation of the power station. Based on detailed analysis of geological dam-site data, three-dimensional finite element model of the stilling high steep slope is established, by combining unloading rock mechanics theory, the dynamic stability response of the still- ing high and steep slope during the excavation by the elastic-plastic finite element method is studied. Deformation , stress , plastic zone size and its distribution of the slope in construction and operation period are studied under the working conditions of unloading, unloading after excavation, dynamic unloading, unloading during heavy rains and unloading during earthquake. The stability of the slope is assessed and reinforcement measures are proposed. The research results have great reference value for the design and construction, and also have certain reference function for other projects.

关 键 词：岩石力学 高陡边坡 三维开挖 动态卸荷 稳定性分析 

分 类 号：TU452[建筑科学—岩土工程]