| 上软下硬地层隧道围岩渐进破坏机制分析 |
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| 引用本文： | 王鸣涛,吴波,赵勇博.上软下硬地层隧道围岩渐进破坏机制分析[J].福建工程学院学报,2016,0(4):344-351. |
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| 作者姓名： | 王鸣涛 吴波 赵勇博 |
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| 作者单位： | 福建工程学院土木工程学院 |
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| 摘 要： | 软硬结构面的存在阻断了岩体性质的连续性，结构面倾角的位置和角度会造成多种破坏模式。文章对上软下硬地层隧道的破坏过程和破坏模式进行数值模拟研究。结果表明:分界结构面倾角在30°～75°时隧道稳定性较差；围岩变形破坏特征在对称模式下，围岩位移、破坏区和塑性区呈对称分布；在非对称模式下，结构面倾角和围岩的力学参数决定了破坏区的位置和范围，破坏区的位置主要受结构面倾角的影响。
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| 关 键 词： | 地层隧道 分界结构面 渐进破坏 破坏模式 |
Study on progressive failure mechanism of surrounding rock of upper-soft and lower-hard stratum tunnel |
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| Wang Mingtao,Wu Bo,Zhao Yongbo.Study on progressive failure mechanism of surrounding rock of upper-soft and lower-hard stratum tunnel[J].Journal of Fujian University of Technology,2016,0(4):344-351. |
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| Authors: | Wang Mingtao Wu Bo Zhao Yongbo |
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| Institution: | College of Civil Engineering, Fujian University of Technology |
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| Abstract: | The existence of soft and hard structural planes block the continuity of rock mass properties, the position and angle of structural plane inclination angle can cause a variety of failure modes. A simulation study on the failing process and the failure modes of the tunnel with soft and hard structural planes was conducted. The results indicate that the stability of the tunnel is considerably low when the boundary structural inclination angle is between 30°~75°; under the failure-symmetric mode, the displacement of the surrounding rock, failure zone and plastic zone are symmetrically distributed; under the asymmetrical mode the mechanical parameters of boundary structural plane inclination angle and mechanical parameters of the surrounding rock determine the location and scope of the failure zone, the location of which is mainly affected by the structural plane angle. |
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| Keywords: | struatum tunnel boundary structural plane progressive failure failure mode |
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