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摘要：北京三家店拦河闸已运行48 余年, 经检测发现部分混凝土的老化和病害情况比较严重, 需要尽快进行局部补强加固和全面防护处理。三家店拦河闸混凝土防护施工涉及到对混凝土的防碳化处理、裂缝处理、剥蚀面处理等内容, 应用了防碳化柔性涂料、改性化学灌浆、粘贴碳纤维、喷涂聚脲弹性体等新材料、新技术和新工艺, 为今后处理类似工程提供了宝贵的经验。

关键词：混凝土 化学 聚脲 防护处理

中图分类号tv698.2+2 文献标识码b 文章编号1673- 4637 ( 2006) 04- 0042- 04

rehabilitate measur es to concr ete st r uctur es of the sanj iadian bar r age in beij ing

zhang shi- qing1 ni ming1 zhu zheng- hai1 sun zhi- heng2 guan yu- shi2

(1 beijing urban rivers and lakes division, 100036, china;

2 department of structures and materials, iwhr, 100044, beijing, china)

abst r act the sanjiadian barrage in beijing has been operating for more than 48 years. partial structure