Dam & Safety ›› 2020, Vol. 0 ›› Issue (4): 64-.

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Repair and protection of freeze-thaw erosion on upstream face of concrete dam in cold area

FU Yingqian and WU Chunzhong   

  1. Beijing IWHR-KHL Co., Ltd.
  • Received:2020-05-19 Online:2020-08-08 Published:2020-08-08

寒冷地区混凝土坝上游面冻融剥蚀修复与防护

付颖千1,吴春忠2   

  1. 1.北京中水科海利工程技术有限公司,北京,100038;2.水利部海河水利委员会,天津,300170
  • 作者简介:付颖千(1971— ),女,北京人,工程师,主要从事混凝土缺陷修补项目管理工作。

Abstract: The working conditions of concrete dams in cold area are extremely harsh, especially for the water level change area, the concrete is prone to freeze-thaw erosion. The author analyzes the causes of concrete freeze-thaw erosion, and puts forward the repair methods of concrete freeze-thaw erosion and the measures of concrete surface durability protection. In addition, three examples of concrete freeze-thaw erosion repair and surface protection in the water level change area are introduced to provide reference for the treatment of similar defects.

Key words: freeze-thaw erosion, repair, durability protection, SK hand scraped polyurea

摘要: 寒冷地区的混凝土坝工作条件极其苛刻,尤其是水位变化区,混凝土容易发生冻融剥蚀破坏。笔者分析了混凝土冻融剥蚀的原因,提出了寒冷地区混凝土冻融剥蚀的修复方法,以及在混凝土表面进行耐久性防护的措施,介绍了3座大坝水位变化区混凝土冻融剥蚀修复及表面防护实例,为类似工程的缺陷处理提供了借鉴。

关键词: 冻融剥蚀, 修复, 耐久性防护, SK手刮聚脲