| 排桩预应力支护结构中锚筋预应力的施工力学 |
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| 引用本文： | 郭院成,曹二帅,王新玲.排桩预应力支护结构中锚筋预应力的施工力学[J].河南科学,2001,19(4):356-359. |
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| 作者姓名： | 郭院成 曹二帅 王新玲 |
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| 作者单位： | 郑州大学土木工程学院 |
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| 基金项目： | 河南省教育厅科技攻关项目资助 ( 2 0 0 0 5 60 0 0 6)，郑州工业大学综合设计研究院特种结构与岩土工程研究所专
项基金资助 ( 2 0 0 1 0 3 ) |
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| 摘 要： | 排桩预应力基坑支护结构中预应力锚杆的设计和施工是关系基坑安全大计的关键。工程中同排预应力锚杆张拉锁定值通常是相等的 ,而施工中先张拉锚杆预应力水平在后张拉锚杆预应力施工过程中将发生变化 ,由此导致同排锚杆预应力水平不一致。本文按顺序张拉施工假定 ,研究建立了锚杆预应力施工力学计算模型 ,推导了工程常见的 2～ 4跨腰梁条件下 ,各锚杆预应力施工锁定值 ,按此施工可保证同排锚杆预应力水平的最佳一致性。
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| 关 键 词： | 张拉控制应力 支护结构 施工力学 |
| 文章编号： | 1004-3918(2001)04-0356-04 |
| 修稿时间： | 2001年7月10日 |
The construction mechanics of anchor bar prestressing in pit su pporting structure of row of piles |
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| GUO Yuan-cheng,WANG Xin-ling,CAO Er-shuai.The construction mechanics of anchor bar prestressing in pit su pporting structure of row of piles[J].Henan Science,2001,19(4):356-359. |
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| Authors: | GUO Yuan-cheng WANG Xin-ling CAO Er-shuai |
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| Abstract: | The design and construction of prestressed anchor bar in pit supporting structure of row of piles are key about safety of foundation pit. In engineering, the prestress of prestressed anchor bars on same row is equal, but the stress of prestressed anchor bar will take place vary after the later anchor bars are prestressed, thus the prestressing values of anchor bars on same row are different. In the article, based on prestressing construction in order, the calculating mode of construction mechanics of anchor bar prestressing is established, and construction prestressing value on same row anchor bars is derived in the condition of 2～4 spans belt beam. The results can ensure the most consistent of prestressing value on same row anchor bars. |
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| Keywords: | stretching control stress supporting structure construction mechanics |
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