基于在线监测数据的水库围坝渗流安全分析

Seepage Safety Analysis of Reservoir Dam Based on Online Monitoring Data

以济南市济阳区稍门平原水库西坝为例,通过对测压管水位在线监测数据整理分析,采用有限元法对大坝复合土工膜反演等效渗透系数,重新复核大坝渗流安全。结果表明:测压管水位与库水位变化趋势一致,正相关性较好,实测数据可靠性高;坝体渗流正常稳定,无明显趋势性变化;各工况条件下的坝基水力比降、逸出点比降均小于允许比降,大坝渗流稳定性满足要求。

Taking west dam of Shaomen plain reservoir in Jiyang District of Jinan Municipality as an example,through sorting and analyzing the online monitoring data of pressure pipe water level,finite element method was used to invert the equivalent permeability coefficient of the dam composite geo-membrane,and re-check the seepage safety of the dam.The results show that the variation trend of the water level in the pressure measuring pipe is consistent with that in the reservoir,the positive correlation is good,and the reliability of the measured data is high.The seepage flow in the dam body is normal and stable,and there is no obvious change trend.The hydraulic gradient of dam foundation and the gradient of escape point under each working condition are less than the allowable gradient,and the seepage stability of the dam meets the requirements.