十三陵水库防渗效果分析

Analysis on anti-seepage effect of Ming Tombs Reservoir

十三陵水库建库后,从大坝坝基以及古河道一线渗漏十分严重,水库蓄水能力严重不足。为此,十三陵水库分别于1962年及1991年修建了坝脚及库尾防渗墙,通过几十年的实际检验,防渗效果显著。在低水位情形下,水库渗漏量的估算是选取水库上游经营户没有用水的时间段内,利用水量平衡原理,对渗透量进行简单分析。经测算,水库在没有用水及其他隐性补给的情况下,日均渗漏量约1万m3。

After the completion of Ming Tombs Reservoir, the seepages are quite serious along the dam foundation and the ancient river channel, and then the storage capacity of the reservoir is far insufficient. Therefore, cutoff walls are constructed at both the dam toe and the tail of the reservoir in 1962 and 1991 respectively. Through the practical verification for decades of years, the anti-seepage effect is very significant. Under the lower water level, the seepage of the reservoir is assessed during the period that no any water-takings from the upstream water-users ; i.e. a brief analysis on the seepage is made in accordance with the principle of water balance. Through the relevant measurement and calculation, the daily mean seepage of the reservoir is a- bout 10 000 m3 under the condition of no any water-takings and other potential recharges.