| 后张法施工中预应力筋延伸量计算及影响因素 |
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| 引用本文： | 魏明明.后张法施工中预应力筋延伸量计算及影响因素[J].中国市政工程,2011(3):67-69,72. |
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| 作者姓名： | 魏明明 |
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| 作者单位： | 上海城建(集团)公司工程总承包部,上海,200125 |
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| 摘 要： | 简单分析了后张法预应力张拉施工中预应力筋的不同施工次序所应考虑的施工风险,介绍了规范中关于预应力筋张拉伸长量理论值的2种给出途径。详细介绍了预应力筋的实测伸长量的计算,包括伸长实测值和应该扣除的伸长部分。最后讨论了千斤顶安装位置对张拉力的影响及一端张拉另一端补拉的效果分析。
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| 关 键 词： | 后张法 预应力张拉 穿索 伸长量 千斤顶安装 |
On the Extension Value Calculation & Influence Factors of Prestressed Reinforcing Steel of Post-tensioning Method Construction |
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| WEI Ming-mingGeneral Contracting.On the Extension Value Calculation & Influence Factors of Prestressed Reinforcing Steel of Post-tensioning Method Construction[J].China Municipal Engineering,2011(3):67-69,72. |
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| Authors: | WEI Ming-ming[General Contracting |
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| Affiliation: | WEI Ming-ming[General Contracting Department of Shanghai Urban Construction(Group) Co.,Ltd.,Shanghai 200125,China] |
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| Abstract: | The post-tensioning method is analyzed briefly in this paper focusing on the construction risk by different construction sequence of prestressed reinforcing steel.And two methods to extension theoretical value of prestressed reinforcing steel are introduced according to the standard.Then,the practical extension calculation is presented in detail involving extension practical value and the deducted value.Finally,the influence of lifting jack installation on tensioning force is discussed and the effect analys... |
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| Keywords: | post-tensioning method prestressed tensioning through cable extension value lifting jack installation |
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