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对紧水滩拱坝1986年至1994年底渗流观测资料进行了较全面系统的分析，对坝基扬压力分布态势和变化过程进行描述，并采用模糊聚类分析方法对该测点群进行了分型划类和相似性分析，对各坝段扬压力系数进行计算和分析，通过建立统计模型，对测值变化规律及影响因素作了分析．通过分析认为，紧水滩大坝坝基渗流符合一般规律，坝基工作性态是稳定安全的．但部分坝段坝基扬压力从1992年开始有所增大，左岸多数坝段扬压水位呈上升趋势变化，应予以注意．
This paper analyzes the seepage observation data of Jinshuitan arch dam from 1986 to the end of 1994 and describes the distribution trend and change process of the uplift pressure in the dam foundation. The cluster classification method is used to classify this point group And similarity analysis, the coefficient of tympanic pressure in each dam section is calculated and analyzed. Through the establishment of statistical model, the changing rules of measuring value and the influencing factors are analyzed. The analysis shows that the seepage flow of dam foundation of Jishuitan Dam accords with the general rule, and the working behavior of dam foundation is stable and safe. However, the subgrade pressure of some dam sections has been increasing since 1992, and the pressure levels at most dam sections of the left bank have shown an upward trend, which should be paid attention to.