大孔隙地层防渗堵漏灌浆新技术及工程应用

Progress in grouting technology for seepage prevention and reinforcement in macroporous strata

渗漏是水电工程、地下矿山等工程中经常碰到的问题,对于多数工程而言,渗漏水多是由大孔隙形成的集中渗漏通道造成的。灌浆是解决工程渗漏问题的重要手段,但对于动水条件下大孔隙地层的防渗堵漏,常规灌浆技术无法经济、有效解决此类问题。本文基于已有研究成果,根据大孔隙地层防渗堵漏特点,总结了新型速凝膏浆和低热沥青两种新型灌浆材料及灌浆工艺技术,并在工程中得到了成功应用,可为解决大孔隙地层防渗堵漏问题提供有益参考。

Leakage is a common problem in hydropower projects and underground mines.For most projects,much of the leakage is caused by a concentrated leakage channel formed by large pores.Grouting is an important way to solve the leakage problem of the projects.However,due to the difficulty of seepage prevention and reinforcement in macroporous formation,especially in the presence of moving water conditions,conventional grouting material is still unable to solve such problems economically and effectively.Based on the existing research results and according to the large pore formation leak characteristics,this paper sums up the quick coagulating paste-slurry,low thermal asphalt and other new grouting materials and grouting technology which have been effectively applied to the project,and can provide a useful reference for solving the large pore formation seepage problem.