寒冷地区混凝土坝溢流坝段补强加固效果分析  

Effect analysis on rehabilitation of overflow sections of concrete dams in cold area

作　　者：宋恩来[1] 

机构地区：[1]东北电网有限公司,辽宁沈阳110181

出　　处：《大坝与安全》2009年第4期4-8,15,共6页Dam & Safety

摘　　要：丰满和水丰大坝均为混凝土重力坝,坝高、坝长和体型相近,同在1937年开始修建,同处寒冷山区,溢流坝段均进行过补强加固,其破坏都是由冻融和冻胀所致。加固后水丰大坝已安全运行近50年,而丰满大坝加固20年后,部分坝段由于冻融和冻胀破坏已降低了抗冲蚀能力,影响泄洪建筑物安全运行。本文对其原因进行了分析。Fengman dam is a concrete gravity dam in cold area, which is similar with Shuifeng dam in aspects as dam height, length and type. The overflow sections of the two dams had been rehabilitated because of freeze-thaw and frost heave destruction. After rehabilitation, Shuifeng dam has been in safe operation more than 50 years, while some dam sections of Fengman dam have been destructed again by freeze-thaw and frost heave which exerted had influence on flood discharge structures. This paper analysed the cause reasons, for discussion.

关 键 词：坝体渗水 廊道 排水 冻融 冻胀 冲蚀破坏 

分 类 号：TV698.2[水利工程—水利水电工程]