| 小净距偏压公路隧道开挖顺序优化 |
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| 引用本文： | 靳晓光,刘伟,郑学贵,丁浩.小净距偏压公路隧道开挖顺序优化[J].公路交通科技,2005,22(8):61-64. |
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| 作者姓名： | 靳晓光 刘伟 郑学贵 丁浩 |
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| 作者单位： | 重庆交通科研设计院,重庆,400067 |
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| 摘 要： | 小净距偏压隧道合理开挖顺序对隧道围岩稳定和支护措施优化有很大的影响。结合净距4.0m、偏压25°公路隧道工程实践,通过二维、三维弹塑性有限元数值仿真模拟,分析了隧道开挖顺序对围岩破坏接近度、围岩变形位移以及对空间围岩体塑性破坏和位移的影响,得到了先开挖浅埋侧隧道优于先开挖深埋侧隧道的结论,为小净距偏压隧道优化设计和施工提供了科学依据。
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| 关 键 词： | 小净距偏压隧道 开挖顺序 数值仿真 优化 |
| 文章编号： | 1002-0268(2005)08-0061-04 |
| 收稿时间： | 2004-06-02 |
| 修稿时间： | 2004年6月2日 |
Optimization of Excavating Sequence for Closely Spaced Bias Double-tube Tunnels |
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| JIN Xiao-guang,LIU Wei,ZHENG Xue-gui,DING Hao.Optimization of Excavating Sequence for Closely Spaced Bias Double-tube Tunnels[J].Journal of Highway and Transportation Research and Development,2005,22(8):61-64. |
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| Authors: | JIN Xiao-guang LIU Wei ZHENG Xue-gui DING Hao |
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| Abstract: | Reasonable excavating sequence for closely spaced bias doubletube tunnels has important impact on stability of surrounding rock and supports optimization.Based on tunnel engineering practice with clear distance of 4.0m and bias angle of 25 the influence of excavating sequence on surrounding rock mass were anlysed through 2D and 3D elasticplastic finite numerical simulation such as surrounding rock damage,deformation displacement of surrounding rock mass,plastic failure and displacement of spatial surrounding rock mass etc. The conclusion had been obtained that excavating shallow tunnel should be given priority rather than excavating deep tunnel. |
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| Keywords: | Closely spaced bias double-tube tunnel Excavating sequence Numerical simulation Optimization |
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