| 预应力锁定值对桩锚复合土钉支护结构的影响研究 |
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| 引用本文： | 宋卫康,郭院成,丁文其. 预应力锁定值对桩锚复合土钉支护结构的影响研究[J]. 河南科学, 2009, 27(6): 690-693 |
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| 作者姓名： | 宋卫康 郭院成 丁文其 |
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| 作者单位： | 同济大学土木工程学院地下建筑与工程系,上海,200092;同济大学岩土及地下工程教育部重点实验室,上海,200092;郑州大学土木工程学院,郑州,450001;郑州大学土木工程学院,郑州,450001;同济大学土木工程学院地下建筑与工程系,上海,200092;同济大学岩土及地下工程教育部重点实验室,上海,200092 |
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| 摘 要： | 运用有限元方法对某典型桩锚复合土钉支护结构进行了分析，主要考虑预应力锁定值对支护结构在后续开挖过程中所产生内力和位移的影响．研究结果表明：在开挖过程中，随着预应力锁定值的增大，桩体水平位移逐渐减小，预应力大小在基坑一定深度范围内对桩体位移影响显著，同时对地面沉降的影响也存在一个有效的范围．锚杆轴力分析结果表明，预应力锁定值越大，锚杆预应力损失越严重．锁定值较小时，锚杆轴力增加较大；当锁定值过大时，从开挖到结束锚杆轴力变化很小．
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| 关 键 词： | 基坑 桩锚复合土钉 有限元 预应力 |
Study on the Effects of Prestress Force on Pile-Anchor Composite Soil Nailing Structure |
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| Song Weikang,Guo Yancheng,Ding Wenqi. Study on the Effects of Prestress Force on Pile-Anchor Composite Soil Nailing Structure[J]. Henan Science, 2009, 27(6): 690-693 |
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| Authors: | Song Weikang Guo Yancheng Ding Wenqi |
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| Affiliation: | 1.Department of Geotechnical Engineering;Tongji University;Shanghai 200092;China;2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education;3.School of Civil Engineering;Zhengzhou University;Zhengzhou 450001;China |
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| Abstract: | A typical pile-anchor composite soil nailing structure is analyzed by finite element method(FEM)in this paper.The effect of prestress force on the displacement and internal force of the retaining structure during the excavation process is especially considered.The analysis results indicate that in the process of excavation, with the increase of the inherent stress value of anchor,the horizontal displacement of the pile decreases gradually.The value of prestress force has a great effect on the displacement o... |
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| Keywords: | foundation pit pile-anchor composite soil nailing finite element method prestress force |
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