摘要
江垭大坝自1998年底蓄水运行以后,由于大坝基岩深层D2y岩层特殊的岩性,大坝一直存在罕见的抬升现象。在江垭大坝坝址地质情况,抬升机理分析的基础上,通过对10余年来监测资料的统计分析,认为抬升现象主要是D2y岩层在较高的水头持续作用下产生时效变形的结果,抬升发展目前虽然未停止,但其增长空间有限。
Since water impoundment and operation at the end of 1998, and because of specific lithologic charactersof D2y rock stratum, the deep layer of Jiangya dam bedrock, have caused infrequent lifting-up of rock mass. Through an analysis about geological characteristics of dam location and lifting-up theory, and statistical analysis on monitoring data of more than ten years, the paper suggests that lifting-up of rock mass is caused by the secular distortion formed by D2y rock stratum under sustained action of higher water head. Although there still exists the lifting-up, there is a finite span for aggravation.
出处
《水利信息化》
2011年第5期16-20,共5页
Water Resources Informatization
关键词
江垭大坝
抬升
D2y岩层
统计建模
时效变形
资料分析
Jiangya dam
lifting-up of rock mass
D2y rock stratum
statistics modeling
secular distortion
materials analysis
