人工深水湖渗流场及防渗方案三维仿真模拟研究

Research on 3D Numerical Emulation for Seepage Field & Impervious Scheme of Artificial Deep-water Lake

郑州市郑东新区龙湖规划水面面积为6.08km2,为我国最大的城市人工湖。因其成湖地层主要为细砂,其建设存在开挖施工防渗、成湖后的有限防渗、地下水交换,以及防止周边地区浸没、盐渍化等问题。应用三维渗流有限元法数值模型对龙湖工程施工和运行期防渗方案进行了模拟仿真计算,给出了工程区地下水位、渗漏量、渗透坡降、渗流场的变化以及优化防渗方案。

The planned water surface area of the dragon lake, which is the largest urban artificial lake of china, is 6.08 km^2 in Zhengdong New District of Zhengzhou city. The mainly formed stratum of the lake is fine sand, so the existed problem are seepage control during construction, limited seepage control after completion, exchange of groundwater, and prevention of immersion and salinization in the border area. Numerical model is applied in the analog emulation computation of seepage control program during the construction period and operating period of the dragon lake project by 3D finite element method, so that the change of potential energy of groundwater, leakage, seepage slope, seepage field and the optimized seepage control program are acquired within the engineering construction area.