高坡岭水库大坝防渗墙施工及截渗效果分析

Construction of impervious wall and its effect at Gaopoling reservoir dam

高坡岭水库大坝是海南省较早被水利部评定为"三类坝"的重点中型水库,是一座建于强透水性砂砾石层上以砂土填筑的土坝,在除险加固前坝体渗漏和坝基渗漏严重。本文主要介绍了高坡岭水库大坝除险加固采取混凝土防渗墙和水泥土防渗墙设计和施工情况,对截渗前后坝基渗流监测情况进行对比分析,评价了大坝截渗效果,为类似水库除险加固工程提供借鉴。

Built on serious pervious sand and gravel, filled with sand, Gaopoling reservoir is an important middle-sized reservoir of Hainan Province, which was evaluated as third-class dam by Water Resource Ministry in 2001. Before rehabilitation, serious seepage existed at dam body and dam foundation. This paper mainly introduced the design and construction of concrete and cement soil impervious walls at Gaopoling reservoir dam and analyzed seepage monitoring of dam foundation before and after treatment. Further more, the seepage cutoff effect was evaluated, worthy reference for similar projects.