| 杭州湾跨海大桥湿接头混凝土裂缝原因分析及防裂措施研究 |
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| 引用本文： | 雷宇芳,刘可心,汪发红,徐长生. 杭州湾跨海大桥湿接头混凝土裂缝原因分析及防裂措施研究[J]. 公路, 2006, 0(9): 90-94 |
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| 作者姓名： | 雷宇芳 刘可心 汪发红 徐长生 |
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| 作者单位： | 武汉港湾工程设计研究院,武汉市,430071;武汉港湾工程设计研究院,武汉市,430071;武汉港湾工程设计研究院,武汉市,430071;武汉港湾工程设计研究院,武汉市,430071 |
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| 摘 要： | 杭州湾跨海大桥湿接头混凝土,由于恶劣的施工环境、特殊的结构及施工工艺,很容易产生裂缝。通过温度应力计算,分析了裂缝产生的原因,并研制出水化热降低剂,有效地降低了混凝土内部的早期温升,实践证明该措施对抑制湿接头混凝土裂缝效果明显。
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| 关 键 词： | 杭州湾跨海大桥 湿接头 裂缝 温度应力 水化热降低剂 早期温升 |
| 文章编号： | 0451-0712（2006）09-0090-04 |
| 收稿时间： | 2006-06-10 |
| 修稿时间： | 2006-06-10 |
Analysis of Reasons of Concrete Crack in Cast-in-Situ Pier Base of Hangzhou Bay Sea-Crossing Bridge and A Study on Measures for Cracking Prevention |
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| LEI Yu-fang,LIU Ke-xin,WANG Fang-hong,XU Chang-sheng. Analysis of Reasons of Concrete Crack in Cast-in-Situ Pier Base of Hangzhou Bay Sea-Crossing Bridge and A Study on Measures for Cracking Prevention[J]. Highway, 2006, 0(9): 90-94 |
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| Authors: | LEI Yu-fang LIU Ke-xin WANG Fang-hong XU Chang-sheng |
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| Abstract: | Concrete of the cast-in-situ pier base in the Hangzhou Bay Sea-Crossing Bridge is prone to crack because of the aggressive environment,special structure and construction technology.The cracking reasons of concrete in the cast-in-situ pier base are discussed by temperature stress calculation.A new hydration heat-reducing admixture is developed which could reduce temperature rise and restrain cracking in the concrete at early age effectively. |
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| Keywords: | Hangzhou Bay Sea-Crossing Bridge cast-in-situ pier base cracking temperature stress hydration heat-reducing admixture temperature rise in early age |
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