Abstract: 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 bad influence on flood discharge structures. This paper analysed the cause reasons, for discussion.

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。