耿湾淤泥堆场粘土斜墙坝稳定渗流场有限元分析

Finite Element Analysis of Steady Seepage Filed of Clay Inclined-wall Dam for Gengwan Silt Storage Yard

耿湾粘土斜墙坝防渗体系的效果直接影响坝体安全稳定,根据耿湾堆场粘土斜墙坝设计剖面,构建了渗流分析数值模型,采用固定网格有限元非饱和渗流分析方法,计算了坝体稳定渗流场,分析了其防渗体结构、筑坝材料渗透系数对坝体渗流场的影响,并建议采取反滤防护工程措施保护下游可能出现的出逸面坝坡。计算结果表明,坝体防渗体系有效可行。

The anti-seepage system effect of Gengwan clay inclined-wall dam has directly impact on the stability of the dam. According to the clay inclined-wall dam design section of Gengwan storage yard, the numerical model of seepage a nalysis is established. And the fixed grid finite element unsaturated seepage analysis method is adopted to calculate the stability seepage field of the dam body. Then, it analyzes the influence of anti-seepage body structure and permeability co- efficient of dam material on the seepage filed of the dam body. Finally, the filter protection engineering measures are sug- gested to protect the downstream dam slope which appears the escaped-surface possibly. The results show that the anti- seepage system of the dam body is effective and feasible.