某土石坝帷幕灌浆渗流监测成果分析  

Analysis of Seepage Monitoring Data for an Earth-rock Dam after Curtain Grouting

作　　者：李刚[1,2,3] 李军 杨开华 

机构地区：[1]长江科学院工程安全与灾害防治研究所,武汉430010 [2]长江科学院水利部水工程安全与病害防治工程技术研究中心,武汉430010 [3]长江科学院国家大坝安全工程技术研究中心,武汉430010 [4]湖北省外国企业服务公司,武汉430020 [5]湖南澧水流域开发公司索溪公司,湖南张家界427400

出　　处：《长江科学院院报》2012年第5期86-89,共4页Journal of Changjiang River Scientific Research Institute

基　　金：水利部公益性行业科研专项(200901058);国家科技支撑计划课题(2012BAK10B04)

摘　　要：为研究土石坝帷幕灌浆的渗控效果,了解加固后渗压水位的变化规律,针对某黏土心墙坝,采用逐步回归分析和有限元分析方法,对3年来的监测成果进行了分析。逐步回归分析表明:影响坝体渗流场的主要因素是库水位、降雨及时效;往背水方向,库水位的影响程度逐渐减弱,而降雨及时效的影响程度逐渐增强。有限元计算表明:全封闭式帷幕灌浆使大坝渗漏量减小了37.6%,而悬挂式帷幕灌浆只减小了10.7%,全封闭式帷幕灌浆的渗控效果更为显著。This research is to understand the effect of curtain grouting for earth-rock dam and the regularity of seepage pressure variation after reinforcement.We analyzed the monitoring data of a clay-core earth-rock dam by means of stepwise regression and finite elements method.The stepwise regression analysis indicated that the main factors which affect the seepage field are reservoir water level,rainfall and ageing.The influence of reservoir water level on seepage decreased toward downstream gradually while the influence of rainfall and ageing increased.According to computation through finite elements method,partial curtain can reduce seepage by 10.7%,whereas fully closed curtain can reduce seepage by 37.6%.Full curtain grouting performs better in seepage control.

关 键 词：渗流监测 土石坝 逐步回归 有限元 帷幕灌浆 

分 类 号：TV698.1[水利工程—水利水电工程]