特高面板堆石坝排水能力影响因素研究

Study on Factors Affecting Drainage Capacity of Ultra-High Concrete Face Rockfill Dam

为研究特高面板堆石坝坝内排水体的排水能力,采用有限元渗流模拟方法对其影响因素进行了对比分析。研究表明:中部面板失效是控制和影响整个面板坝渗流最为关键的因素;由于上游铺盖区和盖重区的阻断作用,底部面板即使发生失效时,坝体浸润线高程仍然能够较好地控制在排水体内;同比条件下,L型排水体结构型式的排水能力优于倒F型排水体结构型式。

The drainability of the drainage body in the super-high concrete face rockfill dam is studied. The influencing factors are compared and analyzed by the finite element seepage simulation method. The study shows that the failure of the middle panel is the most critical factor in controlling and affecting the seepage of the entire face dam. Due to the blocking effect of the upstream bedding zone and the cover zone, even if the bottom panel fails, the seepage line elevation of the dam can still be well controlled within the drainage body;under the same condition, the drainability of the L-shaped drainage body is better than that of the inverted F-type drainage body.