摘要
按照静载设计、动载复核的设计原则,基于地质勘测资料,针对坝肩抗滑稳定问题的三维特性,采用关键块体理论来识别和描述被结构面切割的岩体,确定相应的控制性滑块,进而运用程序实现三维刚体极限平衡法,选取不同高程的试算面对某水电站300m级高拱坝左、右岸坝肩的静动力抗滑稳定性进行计算分析。在动力分析中,将坝体、库水及其地基作为整个体系,充分考虑坝体、地基和库水三者的动力相互作用。静动综合计算分析的结果表明,拱坝左、右岸坝肩在静力作用下是安全的,且安全富裕较大;在地震作用下也是安全的,但安全裕度不大。这为该拱坝的设计和论证提供了重要的科学依据。
According to the principles of static forces for designing and dynamic forces for checking,3D critical block theory is used to identify and describe all removable blocks based on the geological exploration data. Then the corresponding dominative sliding blocks are determined. For the 3D features of the abutment stability problem,the program of 3D rigid body limit equilibrium method is developed to compute and analyze the sliding resistance stability of high arch dam abutments of a hydropower station,nearly 300 m in height,under static and dynamic loadings with several different elevation planes. In dynamic analysis method,the arch dam,reservoir water body and dam foundation are regarded as an integrated system,so that the dynamic interaction between the blocks and dam body can be effectively considered. The results obtained by the method integrating static and dynamic loadings indicate that the arch dam abutments of both sides are stable under static loading with enough margin of safe. While under the action of earthquake,the dam is safe though the factor of safety is not very high. All of these provide significant scientific bases for design and demonstration of high arch dam.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第S1期3058-3063,共6页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展规划(973)项目(2007CB714101)
中国博士后科学基金项目(20070420706)
关键词
水利工程
坝肩稳定性
高拱坝
三维分析
水电工程
hydraulic engineering
abutment stability
high arch dam
3D analysis
hydropower engineering
