| 断层破碎带隧道衬砌静力稳定性分析 |
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| 引用本文： | 李德武.断层破碎带隧道衬砌静力稳定性分析[J].现代隧道技术,2011,48(2):49-53. |
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| 作者姓名： | 李德武 |
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| 作者单位： | 兰州交通大学,兰州,730070 |
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| 摘 要： | 结合一实际工程,选取包括断层破碎带和断层影响带在内的沿隧道纵向300m的计算区域,用八节点六面块体单元将计算区域离散化,采用三维弹塑性静力有限元法模拟分析隧道各个施工阶段,以及建成后围岩和衬砌的受力与变形状态。通过分析比较可知:(1)断层破碎带处的坑道变形和围岩塑性区均明显比非断层破碎带处要大;(2)由于断层破碎带的影响,初期支护、二次衬砌内力的增加幅度约为10%～30%。
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| 关 键 词： | 断层破碎带 隧道衬砌 弹塑性 有限元 |
Static Stability Analysis of Tunnel Lining in Fractured Zone |
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| Li Dewu.Static Stability Analysis of Tunnel Lining in Fractured Zone[J].Modern Tunnelling Technology,2011,48(2):49-53. |
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| Authors: | Li Dewu |
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| Institution: | Li Dewu(Lanzhou Jiaotong University,Lanzhou 730070) |
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| Abstract: | Based on one tunnel project,a 300-meter calculation zone along the tunnel in longitudinal direction was selected,including the fractured zone and affected zone.The calculation zone was discretized by using block elements with 8 nodes and 6 planes.Each tunnel construction stage and state of stresses and deformations of surrounding rocks and lining were simulated and analyzed by three-dimensional elasto-plastic static FEM.Based on the analysis and comparison,it is concluded that the tunnel deformations and th... |
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| Keywords: | Fractured zone Tunnel lining Elasto-plastic finite element |
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