基于数值实验的某水电站大坝三维防渗方案研究

某水电站左右岸坝肩均有一定厚度覆盖层,如不处理则存在绕坝渗流问题。设计在此考虑了两类防渗墙措施,即防渗墙不穿透粉质黏土层和防渗墙与基岩封闭,为了优化防渗墙的长度和评估渗漏量,在此设计了4种不封闭工况和2种封闭工况,目的是优化防渗墙长度。根据计算结果分析发现,发现不同部位的渗漏量、水力梯度和水头值均随着防渗墙的延伸单调递减,不封闭时存在渗漏量偏大和局部水力梯度不满足规范要求的问题;封闭时,则渗流量不大,且各部位水力坡降满足规范要求,推荐防渗墙封闭措施。

Study on Optimal Anti-seepage Scheme of Certain Hydropower Station Based on Numerical Test

There exists certain depth cover stratum in both sides of hydropower station dam,if it isn't done with seepage problem around the dam in the abutment of a hydropower station being taken place.So both kinds of the cut-off wall is designed,one is the cut-off isn't penetrated through the silty clay layer,the other being extended into the rock mass.In order to optimize the length of the wall and estimate the leakage from these problems,four kinds of no penetration scheme and two kinds of linking into rock mass ...