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密云水库走马庄副坝自1960年竣工以来,曾经多次加固处理并经历了2次高水位的考验,1976年还经受了唐山地震的考验。但从1999年开始,密云水库连遇枯水年,径流量大大减少,库水位较低,统计了1999年以后的测压管资料,通过位势分析法表明该坝渗流条件目前正在改善;通过回归分析找出了坝基及绕坝测压管水位与水库水位的线性关系;在特定库水位136.40 m时,分析了各测压管的渗流变化,得出24#管处坝基存在不稳定因素,应加强附近出水点的观测并及时分析。
Since its completion in 1960, Miyun Reservoir Suma Zhuang Auxiliary Dam has been reinforced several times and has undergone two tests of high water level. In 1976, it also stood the test of the Tangshan earthquake. However, since 1999, the Miyun Reservoir suffered serious runoff and its runoff decreased greatly. The reservoir water level was relatively low. Based on statistics of the piezometric data after 1999, the potential flow conditions of the dam were being improved through the potential analysis. The regression analysis found the linear relationship between the piezometric level of the dam foundation and the dam around the dam and the reservoir water level. When the specific reservoir water level was 136.40 m, the seepage variation of each piezometric pipe was analyzed, and the instability of the dam foundation was found at 24 # Should strengthen the nearby water point observation and timely analysis.