水力发电学报2014，Vol.33Issue(3)：258-266,9.
复杂条件下大型尾水隧洞围岩稳定性分析及支护对策
Study on stability of surrounding rock masses and support measures in large tailrace tunnel under complex conditions
摘要
Abstract
A large hydropower station with five tailrace tunnels is located in a deep ravine.These tunnels are characterized by large size in diameter,deeply buried,long length,complex geological conditions,and great difficulty in project layout,which leads to poor stability of the surrounding rock masses in the conditions of excavation unloading.In their support design and construction,a great emphasis must be put on consideration and prediction of such stability feature.For a comprehensive evaluation of the stability,this study used methods of engineering analogy,theoretical analysis and numerical analysis to systematically analyze excavation response,failure mode,influence of adverse geological structures,and block stability.The research results and this discussion on supporting countermeasures about principles,measures and opportunity of supporting will be useful for design and construction of large tailrace tunnels under complex conditions.关键词
岩石力学/围岩稳定性/数值分析/尾水隧洞/支护对策Key words
rock mechanics/ stability of the surrounding rock/ numerical analysis/ tailrace tunnel/supporting countermeasures分类
建筑与水利引用本文复制引用
倪绍虎,吕慷,杨飞,陈益民,刘宁..复杂条件下大型尾水隧洞围岩稳定性分析及支护对策[J].水力发电学报,2014,33(3):258-266,9.基金项目
浙江省自然科学基金项目(LY13E090003) （LY13E090003）
