重力坝渗漏量监测分析模型及工程应用

Gravity Dam Leakage Monitoring Analysis Model and Engineering Application

渗漏量是重力坝渗流安全评价的重要指标之一,也是重力坝安全监测的主要项目之一。本文在分析重力坝渗漏量关键影响因素的基础上,构建了重力坝渗漏量监测值的数学分析模型,并结合某重力坝的渗漏量监测资料,对该重力坝渗漏量的变化规律进行了分析。监测资料分析表明,该重力坝渗漏问题不突出,大坝总渗漏量最大值不超过20L/min,多年平均渗漏量为5.8L/min。坝体历经蓄水初期的渗漏量降低后,后期已趋于收敛,渗漏量无明显的增大趋势。仅在0+000m^0+041m和0+160m^0+218m两段,即坝的两端还有一定的渗漏量,量值较小,不致影响大坝安全。

Leakage is one of the important indicators for the evaluation of seepage safety of gravity dams,and it is also one of the major safety monitoring projects for gravity dams.Based on the analysis of the key influencing factors of the seepage of gravity dams,this paper constructs a mathematical analysis model of the monitoring value of the seepage of gravity dams.Combined with the monitoring data of the leakage of a gravity dam,the change of the leakage of gravity dams is analyzed.The law was analyzed.Monitoring data analysis shows that the gravity dam seepage problem is not prominent,the maximum total dam leakage does not exceed 20L/min,and the average annual leakage is 5.8L/min.After the dam has experienced a reduction in the amount of leakage at the initial stage of impoundment,it has converged in the later period and there is no obvious increase in the leakage.Only in 0+000m^0+041m and 0+160m^0+218m two sections,that is,there is a certain amount of leakage at both ends of the dam,and the magnitude is small,which will not affect the safety of the dam.