乌溪水库工程地下水渗流场数值模拟研究

Study on numerical simulation of groundwater seepage field in Wuxi reservoir project

长水工隧洞在施工和运营过程中改变了隧洞区周边的地下水状态,会造成隧洞中涌水以及高压输水过程中的泄露等问题,水库蓄水后库区、下游区地下水位变化或引起滑坡、土壤盐渍化和沼泽化等问题,需要对地下水渗流场进行详细分析与预测。针对乌溪水库工程,利用HYDRUS2D软件进行数值模拟,对隧洞区地下水压力、渗流量和蓄水后水库区、大坝下游区地下水位变化进行定量预测,为项目建设提供重要技术支持,取得了良好效果,可为其他类似工程提供借鉴。

The long hydraulic tunnel changes the groundwater state around the tunnel area during construction and operation,which is easy to cause the problems of water gushing in the tunnel and leakage in the process of high-pressure water conveyance.It is necessary to analyze and predict the seepage field of groundwater in details aiming at the problems of groundwater level change in reservoir area and downstream area or landslide,soil salinization and marsh,etc.after water accumulation in the reservoir.Wuxi reservoir project,HYDRUS2D software is used for numerical simulation to quantitatively predict the groundwater pressure,seepage flow and the changes of groundwater level in the tunnel area and the downstream area of the reservoir and the dam in the tunnel area,thereby providing important technical support for the project construction,achieving excellent effect,and providing reference for other similar projects.