某水库大坝渗漏成因及除险加固效果研究

Research on the causes of leakage in a reservoir dam and the effect of rehabilitation

以湖南省常宁市洋泉水库除险加固工程为背景,对该水库大坝的渗漏现状及成因进行分析,提出帷幕灌浆的治理措施,同时对除险加固工程实施后的坝体渗流及边坡稳定进行建模分析。结果表明,坝体经过除险加固处理后,渗流和边坡安全均可达到安全标准,帷幕灌浆有效降低了坝后水力坡降,保障了坝体安全稳定运行。本工程采用的措施及相关分析方法,可为类似中小型水库的治理提供借鉴。

Taking Yangquan reservoir rehabilitation project in Changning city,Hunan province as an ex-ample,the current situation and causes of leakage in the reservoir dam are analyzed and treatment by curtain grouting is proposed.As well,model is established to analyze dam seepage and slope stability af-ter rehabilitation.Results show that after rehabilitation,both seepage and slope safety can meet safety standards.Curtain grouting has effectively reduced the hydraulic gradient behind the dam,ensuring the safe operation of the dam body.The measures and related analysis methods adopted in this project can provide reference for the treatment of similar small and medium-sized reservoirs.