水利枢纽工程库区浸没影响分析

Analysis of Immersion Effect in Reservoir Area of Water Conservancy Project

库区出渗及浸没是城区水利工程建设普遍面临的问题,以具体工程为例,在概述工程概况及地形地貌、地质条件的基础上,通过库区渗流数值模型对库区渗流现象发生的可能性进行了分析,并利用库区渗流场所具有的单向渗流特性,提出在北堤和南堤设置高喷防渗墙并将防渗墙底部深入弱透水层,以有效阻截上层砂层渗流,而在城堤段设置高喷防渗墙的同时增设减压井,以取得较好的库区出渗及浸没防治效果。

Seepage and submergence in reservoir area are common problems in urban hydraulic engineering construction.Taking a specific project as an example,based on an overview of the project,topography,and geological conditions,the possibility of seepage phenomena in the reservoir area is analyzed through a numerical model of seepage in the reservoir area.Taking advantage of the unidirectional seepage characteristics of the seepage sites in the reservoir area,it is proposed to set high-pressure jet grouting cutoff walls on the north and south embankments and penetrate the bottom of the cutoff wall into the weak permeable layer to effectively intercept the seepage of the upper sand layer While,a high-pressure jet grouting cutoff wall is installed at the urban embankment section and a relief well is added,so as to achieve better prevention and control effects of seepage and immersion in the reservoir area.