丰满大坝溢流坝段长期渗漏原因探析

Reason discussion of long-term leakage for overflow section of Fengman dam

丰满大坝渗漏造成坝体混凝土冻融破坏和多次深层冻胀破坏,同时还造成坝体内部溶沟溶槽发育。多年来对溢流坝不断加固治理以及灌浆防渗,但是渗漏仍不能遏止,溢流坝混凝土的破坏速度仍未能减缓。经分析得出:丰满大坝施工期间导流、截流封堵措施不当是造成溢流坝段长期渗漏的主要原因。

The leakage of Fengman dam has been cause the freeze-thaw damage and multiple deep frost heaving damage for the dam concrete and cause the development of water-eroded grike and groove for the internal dam body.The leakage still can not be prevented by the spillway reinforcing treatment and grouting impervious for many years,the damage speed of the spillway concrete still fails to slow down.Based on the analyses,the paper points out the the inappropriate diversion and closure sealing measures during the construction of Fengman dam are the main reasons for the long-term leakage of the spillway section.