| 预应力连续箱梁施工过程中腹板斜向裂缝产生原因及防治 |
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| 引用本文： | 耿会勇.预应力连续箱梁施工过程中腹板斜向裂缝产生原因及防治[J].铁道建筑技术,2011(4):24-27. |
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| 作者姓名： | 耿会勇 |
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| 作者单位： | 中铁十五局集团有限公司南京公司,南京,211106 |
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| 摘 要： | 针对本桥125 m预应力连续箱梁在施工过程中沿腹板下弯束出现斜向裂缝问题,现场采用应力应变测试技术及多种措施进行防治。通过应力分析发现,施工中腹板斜向裂缝产生原因为桥梁纵向腹板束张拉完毕后腹板局部主拉应力过大所造成的,同时提出施工中腹板斜向裂缝的防治措施。
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| 关 键 词： | 连续箱梁 腹板裂缝 应变测试 防治措施 |
Causes and Prevention of Web Inclined Cracks in Prestressed Continuous Box Beam Construction |
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| Geng Huiyong.Causes and Prevention of Web Inclined Cracks in Prestressed Continuous Box Beam Construction[J].Railway Construction Technology,2011(4):24-27. |
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| Authors: | Geng Huiyong |
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| Institution: | Geng Huiyong(China Railway 15th Bureau Group Co.Ltd.,Nanjing 211106,China) |
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| Abstract: | For inclined crack space in web kickdown during the construction process of this bridge 125 m prestressed continuous box beams,strain test technologies and several preventive measures are used on site.Strain analysis has shown that web inclined cracks are caused by the big strain in some parts of the web after the longitudinal stretching of the bridge web.Meanwhile,preventive measures for web inclined cracks in construction are put forward. |
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| Keywords: | continuous box beam web crack strain test preventive measures |
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