摘要
新第三系红层软岩具有暴露吸湿后松弛较为快速的特点,现场开展的变形试验不能完全避免岩体松弛的影响,导致变形模量难以准确取值,这使水电站大坝的安全运行存在着不确定因素。在现场变形试验、对比分析区内其他红层电站试验资料的基础上,对黄丰水电站坝基不同应力状态下的软岩岩体变形模量进行了取值研究,获得了坝基受开挖影响松弛程度不同的岩体松弛的变形模量,为确定坝基岩体的变形模量提供了可靠依据。
Neogene system red-bed soft rock has features of rapid relaxation after exposure and moisture absorption,and the in-situ deformation test can not avoid relaxation of rock mass,which leads to difficulty in value selection of deformation modulus.Therefore,there are uncertain factors in the safe operation of this hydropower station.On the basis of in-situ deformation tests and comparative analysis of other hydropower stations on red-bed rock layer,we study the values of deformation modulus of soft rock mass of Huangfeng Hydropower Station foundation under different states of stress,and obtain deformation modulus of rock mass under different relaxation degrees influenced by foundation excavation.
出处
《人民长江》
北大核心
2010年第10期45-47,共3页
Yangtze River
基金
国家自然科学基金项目(40372127)
关键词
取值
软岩
松弛
变形模量
黄丰水电站
value selection
soft rock
relaxation
deformation parameters
Huangfeng Hydropower Station
