| 吊空模板技术在施工期闸墩混凝土温控防裂中的应用 |
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| 引用本文： | 胡勇,朱岳明,朱明笛,吴泽.吊空模板技术在施工期闸墩混凝土温控防裂中的应用[J].三峡大学学报(自然科学版),2008,30(6). |
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| 作者姓名： | 胡勇 朱岳明 朱明笛 吴泽 |
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| 作者单位： | 1. 河海大学,水利水电工程学院,南京,210098
2. 上海勘测设计研究院,上海,200434 |
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| 基金项目： | 国家自然科学基金项目
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| 摘 要： | 闸墩中心的混凝土在施工后期,由于温度降低而产生收缩,当其受到底板的强约束时就会产生较大的拉应力,容易形成"由里及表"型裂缝.采用吊空模板技术,相当于减小了约束体的体积,降低了约束体的刚度,从而降低了底板对闸墩的约束,大大改善了闸墩混凝土的应力状态.介绍了某水闸工程的温控防裂仿真计算,证实了吊空模板技术能有效防止施工后期闸墩内部裂缝的产生,为同类型的施工分析起到一定的参考作用.
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| 关 键 词： | 闸墩 吊空模板 底板约束 温控防裂 |
Application of Suspension Formwork Technique to Cracking Prevention for Sluice Pier Concrete During Construction |
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| Hu Yong,Zhu Yueming,Zhu Mingdi,Wu Ze.Application of Suspension Formwork Technique to Cracking Prevention for Sluice Pier Concrete During Construction[J].Journal of China Three Gorges University(Natural Sciences),2008,30(6). |
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| Authors: | Hu Yong Zhu Yueming Zhu Mingdi Wu Ze |
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| Institution: | Hu Yong1 Zhu Yueming1 Zhu Mingdi1 Wu Ze2 (1.College of Water Conservancy & Hydropower Engineering,Hohai Univ.,Nanjing 210098,China,2.Shanghai Investigation,Design & Research Institute,Shanghai 200434,China) |
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| Abstract: | The from inside to outside cracking is easily formed in the sluice pier when its temperature drop;shrinkage was constrained by the sluice floor during later construction.Using suspension formwork technique is equivalent to decrease the volume and stiffness of the constraint body,which could effectively improve the stress state in the sluice pier concrete due to the decrease of constraint by sluice floor.Thus,it can effectively prevent cracking in later stage. |
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| Keywords: | sluice pier suspension formwork floor construction temperature control and cracking prevention |
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