东北大型混凝土坝修补加固处理

Repairing and stengthening of large concrete dams in the northeast China

本文对东北地区大型混凝土坝的破坏形式及原因进行了分析，认为产生冻融、冻胀、裂缝、溶蚀和气蚀四类破坏形式的主要原因是混凝土的强度、抗冻、抗渗标号低；温度应力大；原材料和施工质量控制不严等。本文还结合丰满、云峰、桓仁、参窝等坝的修补加固处理工程实例，对修补的目的、选材以及修补工艺分别作了较详细的介绍。

The paper analyses the styles and reasons of the break in the concrete dams. Main reasons of four breaking styles (freeze-thaw, frozen heaving,cracks,corrosion and cavitation erosion) prove to be low grade of concrte strength,low resistance to freeze-thaw,low resistance to permeation,high temperature stress,and material selected and construction out of control. The paper introduces the repairing technique and the selection of repairing materals elaborately,according to the repairing practices of some concrete dams, such as Fengman, Yunfeng, Huanren,Shenwo and etc..