摘要
针对高陡边坡的稳定性问题,以黄河玛尔挡水电站导流洞进口边坡中的随机块体为例,基于统计原理,采用三维极限平衡法对边坡岩体中的随机块体进行搜索,并对块体高度进行敏感性分析,得到块体在天然、暴雨和地震三种工况下的安全稳定系数,并对危险块体进行预应力锚索加固模拟,得到所需施加的锚固力。计算结果给出了导流洞进口边坡中可能存在块体的特征、规模及稳定性,以此提出危险块体加固建议,对实际工程的加固设计具有较大的参考价值。
In order to solve the stability problem of high-steep slope, based on the statistical principle, three-dimen- sional limit equilibrium method is used to analyze the stability of random blocks in the intake diversion tunnel slope of Maerdang hydropower station. And then the random blocks of the slope are searched and made a sensitivity analysis of block＇s height to obtain the safety {actors o{ block in three operating conditions including natura[ condition, rainstorm condition and earthquake condition. Required anchorage force of dangerous block is obtained by simulating reinforcement of prestressing cable. According to the calculation results, the possible blocks characteristics, size and stability in intake slope of diversion tunnel are obtained and some suggestions of strengthening dangerous block are put forward, which pro- vides reference value for reinforcement design of practical engineering.
出处
《水电能源科学》
北大核心
2013年第9期123-126,共4页
Water Resources and Power
基金
国家自然科学基金资助项目(51149004)
湖北省教育厅科学技术研究计划优秀中青年人才基金资助项目(Q20111203)
湖北省宜昌市科学技术研究与开发基金资助项目(A2012-302-01)
三峡大学青年科学基金资助项目(KJ2010A006)
关键词
边坡
块体
三维极限平衡法
敏感性分析
wslope
block
three-dimensional limit equilibrium method
sensitivity analysis
