江垭大坝抬升资料分析及初步建模

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。

Analysis of Materials on Lifting-up of Rock Mass and Preliminary Model Establishment of Jiangya Dam

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.