| 松散堆积体中浅埋小净距隧道施工期位移和应力场的2D分析 |
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| 引用本文： | 周强,黄永强.松散堆积体中浅埋小净距隧道施工期位移和应力场的2D分析[J].中南公路工程,2011(4):16-21,25. |
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| 作者姓名： | 周强 黄永强 |
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| 作者单位： | 湖南路桥建设集团公司;湖南省交通科学研究院; |
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| 基金项目： | 湖南省交通科技项目(200817) |
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| 摘 要： | 采用有限元方法,对松散堆积体中的浅埋小净距隧道施工力学行为进行了数值模拟。结果表明：地层沉降主要发生在两洞拱顶之间的土体范围,且后行洞拱顶部位的扰动范围明显大于先行洞;施工工序对拱顶沉降变形路径影响较大,但对其最终沉降影响并不明显;施工时锁脚锚杆的施工质量有重要作用。
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| 关 键 词： | 小净距 浅埋隧道 松散体 数值模拟 |
2D Numerical Analysis of Shallow Closely-spaced Twin Tunnels in Loose Deposits |
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| ZHOU Qiang,HUANG Yongqiang.2D Numerical Analysis of Shallow Closely-spaced Twin Tunnels in Loose Deposits[J].Central South Highway Engineering,2011(4):16-21,25. |
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| Authors: | ZHOU Qiang HUANG Yongqiang |
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| Institution: | ZHOU Qiang,HUANG Yongqiang(1.Hunan Road and Bridge Construction Group Co.,Ltd.,Changsha,Hunan 410082,China,2.Research institute of Ministry of Communications,China) |
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| Abstract: | The mechanical behavior of shallow closely-spaced twin tunnels in loose deposits during construction is analyzed with the finite element method.The numerical results show that the ground settlement occurs mainly between the crowns of twin tunnels.The disturbed zone of of the crown of the later tunnel is greater than the preceding tunnel.The construction sequence has great effect on the displacement path of the crown but barely on the total deformation.The lock foot anchor on tunnel frame plays an important ... |
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| Keywords: | closely-spaced twin tunnels shallow tunnels loose deposit numerical simulation |
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