| 大断面公路隧道扁平率及围岩状况受力分析 |
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| 引用本文： | 朱彦鹏,宋晓蕊,李忠.大断面公路隧道扁平率及围岩状况受力分析[J].甘肃科学学报,2014,26(3):129-133. |
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| 作者姓名： | 朱彦鹏 宋晓蕊 李忠 |
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| 作者单位： | 兰州理工大学土木工程学院,甘肃兰州,730050 |
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| 摘 要： | 利用有限元软件MIDAS-GTS,建立地层结构模型,分析3种围岩、3种扁平率组合下的大断面扁平隧道受力情况,比较控制点的锚杆轴力、喷混轴力、喷混弯矩及衬砌的位移.研究表明:当三类围岩扁平率为0.588,四、五类围岩扁平率为0.625时,既能保证横断面受力最小,又能维持良好的稳定性,为最优断面.
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| 关 键 词： | 大断面 扁平率 稳定性 地层结构法 MIDAS-GTS |
Analysis of Flat Ratio of Large Section Highway Tunnel and Stress of Surrounding Rocks |
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| ZHU Yan-peng,SONG Xiao-rui,LI Zhong.Analysis of Flat Ratio of Large Section Highway Tunnel and Stress of Surrounding Rocks[J].Journal of Gansu Sciences,2014,26(3):129-133. |
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| Authors: | ZHU Yan-peng SONG Xiao-rui LI Zhong |
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| Institution: | ( School of Civil Engineering, Lanzhou University of Technology ＆ Lanzhou 730050, China) |
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| Abstract: | The finite element software MIDAS-GTS was utilized to build the layer structure model and the force of the large section tunnel which was made of three kinds of surrounding rock in three flat ratios. The axial force of an anchor, axial force and bending moment of shotcrete, and displacement of the lining was compared to select the optimal flat ratio. Research shows that when the flat ratio of surrounding rock Ⅲ is 0. 588 and the flat ratio of surrounding rock Ⅳ or Vis 0. 625,the section,which not only takes a minimum of stress but also maintains greater stability, is optimal. |
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| Keywords: | Large section Flat ratio Stability Layer structure method MIDAS GTS |
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