丰满大坝溢流坝段增设排水系统设计研究

以渗流分析和有限元理论为基础，对丰满大坝充坝段为降低下 游面冻融点位置所提出的增设排水系统的若干设计方案进行了可行性研究，结果表明，新增排水廊道，加密排水幕及优化排水孔的合理位置的设计方案均对降低出水点有不同程度的效果，但都不能达到使其淹入下游面以下的目的，其主要原因是由最初的设计方案造成的，该结论对工程实施有显著的指导意义。

Study of design of adding drainage system in section of Fengman spillway dam

This paper proposes a new FEM of three dimensional unconfined seepage analysis, called abandoned element method. With the help of leakage information of the observed hole inside the dam, the seepage coefficients of the different parts of the dam have been identified by inverse analysis. The feasible design programs about adding drainage in Fengman spillway dam are discussed in order to lower the freezing point location below the water surface of lower reaches. The profitable conclusion has been drawn before the implementation in engineering.