| 摘要: |
| 本文针对水下混凝土病害整治的传统方法中围堰排水施工的缺陷，提出了病害混凝土水下补强加固新技术，即：水下封缝灌浆堵漏—水下老混凝土凿毛处理—水下植筋（含布设钢筋网片）—水下浇筑不分散混凝土，该项技术首次应用于苏北沿海黄沙港闸反拱底板裂缝修补加固工程。现场模拟施工试验表明：这一叠合防渗、整体补强技术切实可行，是传统围堰排水施工方法的重大突破；水下浇筑层不分散混凝土各项力学性能指标均满足工程加固设计要求，新老混凝土结合良好，有效地恢复了混凝土结构的整体性能；经济效益和社会效益显著，推广应用前景广阔。 |
| 关键词: 沿海港闸,水下补强加固,裂缝灌浆堵漏,水下不分散混凝土 |
| DOI： |
| 分类号:TV5 |
| 基金项目: |
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| Experimental studies on the construction technique for underwater strengthening of coastal sluice |
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Gu Qiangsheng,Zhang Xiaoping
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Hohai University
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| Abstract: |
| The traditional strengthening for disease concrete structures under water is building a cofferdam, then draining and rehabilitating. The defect of the method is taking time and costly. for this reason, the paper presents a new under water rehabilitation technique of disease concrete as follows: (1)grouting to concrete crack; (2) chiseling the face of old concrete under water in order to rough it; (3)rooting reinforcement net flat in old concrete; (4) pouring non dispersive concrete under water. The technique mentioned above is much better than the traditional method. The new technique was used at first for concrete crack rehabilitation of Huangsha port sluice in north coast of Jiangsu. By field testing, it shows that mechanical properties of non dispersive concrete poured under water meet the design criterion. Meanwhile, it is proved that old and new concrete are conjoined firmly, and the integrality of concrete structure is resumed effectively. So, the rehabilitation technique of disease concrete under water has notable economic and social results. |
| Key words: coastal sluice, under water strengthening, crack grouting, under water non dispersive concrete |
