| 隧道施工中洞口边仰坡稳定性三维有限元分析 |
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| 引用本文： | 朱合华,李新星,蔡永昌,丁文其. 隧道施工中洞口边仰坡稳定性三维有限元分析[J]. 公路交通科技, 2005, 0(Z1) |
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| 作者姓名： | 朱合华 李新星 蔡永昌 丁文其 |
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| 作者单位： | 同济大学岩土工程重点实验室 上海200092(朱合华，李新星，蔡永昌)，同济大学岩土工程重点实验室 上海200092(丁文其) |
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| 基金项目： | 西部交通建设科技项目资助(200231800022,200331849018)，上海市重点学科(岩土工程)资助 |
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| 摘 要： | 文章以云南思小高速公路麻地河1号连拱隧道为例,首先结合其地形、地质条件,建立了三维弹塑性有限元模型,动态模拟了此隧道上下台阶法开挖过程。同时采用强度折减法分析了隧道在施工过程中边坡的稳定性情况,得出了坡体的安全系数随施工的进行逐渐减小,最后趋于稳定的结论。最后简要分析了边坡的破坏失稳机理,提出需加强观测以及采取一定加固措施的建议。
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| 关 键 词： | 连拱隧道 三维弹塑性有限元 洞口边坡 强度折减法 稳定性 |
3D Nonlinear FEM Analysis on the Stability of the Slope at Tunnel Face during the Construction of the Twin Tunnels |
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| ZHU He-hua,LI Xin-xing,CAI Yong-chang,DING Wen-qi. 3D Nonlinear FEM Analysis on the Stability of the Slope at Tunnel Face during the Construction of the Twin Tunnels[J]. Journal of Highway and Transportation Research and Development, 2005, 0(Z1) |
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| Authors: | ZHU He-hua LI Xin-xing CAI Yong-chang DING Wen-qi |
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| Abstract: | Taking Madehe twin tunnel engineering of the Sixiao expressway in Yunnan province as an example,a 3D nonlinear FEM simulation on the dynamic excavating procedure of the scheme of upper and down benching is processed.The topography and geography conditions of the tunnel site are taken into account.An analysis on safety factor of slope through strength reduction method is presented.The results show that the excavation has great effect on the safety factor.During the excavation,the safety factor is reduced gradually and finally it tends to stability.The strength reduction method is proved to be possible for stability analysis and the results have important guiding significance for construction of the tunnel. |
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| Keywords: | Twin tunnel 3D nonlinear FEM Tunnel slope Strength reduction method Stability |
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