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考虑断层破碎带影响的隧道结构地震反应研究

董捷 郑英豪 李兆琦 陈洪运 宫凤梧 闫鑫 刘洋

董捷,郑英豪,李兆琦,陈洪运,宫凤梧,闫鑫,刘洋,2024. 考虑断层破碎带影响的隧道结构地震反应研究. 震灾防御技术,19(1):140−150. doi:10.11899/zzfy20240114. doi: 10.11899/zzfy20240114
引用本文: 董捷,郑英豪,李兆琦,陈洪运,宫凤梧,闫鑫,刘洋,2024. 考虑断层破碎带影响的隧道结构地震反应研究. 震灾防御技术,19(1):140−150. doi:10.11899/zzfy20240114. doi: 10.11899/zzfy20240114
Dong Jie, Zheng Yinghao, Li Zhaoqi, Chen Hongyun, Gong Fengwu, Yan Xin, Liu Yang. Seismic Response of Cross-fault Tunnel Based on Fluid-structure Interaction[J]. Technology for Earthquake Disaster Prevention, 2024, 19(1): 140-150. doi: 10.11899/zzfy20240114
Citation: Dong Jie, Zheng Yinghao, Li Zhaoqi, Chen Hongyun, Gong Fengwu, Yan Xin, Liu Yang. Seismic Response of Cross-fault Tunnel Based on Fluid-structure Interaction[J]. Technology for Earthquake Disaster Prevention, 2024, 19(1): 140-150. doi: 10.11899/zzfy20240114

考虑断层破碎带影响的隧道结构地震反应研究

doi: 10.11899/zzfy20240114
基金项目: 国家自然科学基金项目(51878242);河北省自然科学基金(E2020404007);河北省住房和城乡建设厅建设科技研究项目(2022-2106);河北省教育厅在读研究生创新能力培养资助项目(CXZZSS2022063);张家口市基础研究和人才培养计划项目(2221016A)
详细信息
    作者简介:

    董捷,男,生于1980年。博士后,教授,研究生导师。主要从事岩土及隧道工程研究。E-mail:dongjie1003@hotmail.com

    通讯作者:

    郑英豪,男,生于1996年。硕士研究生。主要从事桥梁与隧道工程研究。E-mail:282009668@qq.com

Seismic Response of Cross-fault Tunnel Based on Fluid-structure Interaction

  • 摘要: 为研究跨断层隧道在渗流-地震耦合作用下的动力响应,以宣绩铁路周湾村隧道穿越富水断层为背景,基于Biot固结动力方程,采用有限差分软件FLAC 3D进行多场耦合数值计算。本文主要分析了断层破碎带宽度对隧道衬砌特征点加速度、孔压、位移及应力响应规律的影响。研究结果表明,对隧道结构不同位置而言,加速度响应规律一致,均为正常段加速度<破碎带加速度<交界面加速度。耦合场作用下,地层与破碎带交界处围岩位移及应力均发生突变。随着断层宽度的增加,应力及位移突变范围有所增大,孔隙水压力峰值也进一步扩大。此时隧道受压区增大,衬砌结构易发生局部破坏。通过加设注浆层的方式,可有效减少耦合场作用引起的拱圈应力分布不均现象。
  • 图  1  隧道纵坡面图

    Figure  1.  Tunnel longitudinal slope plan

    图  2  数值计算模型

    Figure  2.  Numerical computation model

    图  3  El Centro地震波

    Figure  3.  El Centro seismic waves

    图  4  衬砌各特征点x向加速度时程曲线

    Figure  4.  Time-history curve of acceleration of each characteristic point of lining in x direction

    图  5  不同位置处特征点孔压时程曲线

    Figure  5.  Pore pressure time history curves of characteristic points at different positions

    图  6  不同断层宽度下孔隙水压力云图

    Figure  6.  Cloud map of pore water pressure under different fault widths

    图  7  不同断层破碎带宽度下x方向位移云图

    Figure  7.  Displacement clouds in x direction for different fault fragmentation zone widths

    图  8  不同断层破碎带宽度下z方向位移云图

    Figure  8.  Displacement clouds in z direction for different fault fragmentation zone widths

    图  9  拱腰特征点水平位移时程曲线

    Figure  9.  Horizontal displacement time-history curve of arch waist feature point

    图  10  拱顶特征点竖向位移时程曲线

    Figure  10.  Vertical displacement time-history curve of the characteristic point of the vault

    图  11  特征点最大主应力纵向分布规律

    Figure  11.  Longitudinal distribution law of maximum principal stress at characteristic points

    图  12  不同断层宽度下隧道各特征点最大主应力峰值

    Figure  12.  Peak principal stress at each characteristic point of the tunnel under different fault thicknesses

    表  1  模型材料参数

    Table  1.   Material parameters of the model

    介质密度/(kg·m−3弹性模量/GPa内摩擦角/(°)黏聚力/MPa泊松比 μ渗透系数/(m·s−1
    砂岩20001.3270.200.353.0×10−6
    初期支护230028.00.30
    注浆层20003.0330.250.406.0×10−8
    断层17000.8220.150.401.5×10−5
    下载: 导出CSV

    表  2  接触面参数取值

    Table  2.   Values for contact surface parameters

    名称法向刚度 $ {k_{\rm{n}}} $/(N·m−3切向刚度 $ {k_{\rm{s}}} $/(N·m−3黏聚力 c/kPa内摩擦角$ \varphi $/(°)
    接触面参数1091095017
    下载: 导出CSV

    表  3  隧道各特征点水平位移峰值

    Table  3.   Peak value of horizontal displacement of each characteristic point of the tunnel

    破碎带宽度/m水平位移峰值/mm
    拱顶拱肩拱腰拱脚拱底
    1046.946.845.043.543.3
    2046.646.645.043.442.6
    3046.346.444.943.443.0
    4046.046.044.643.142.8
    下载: 导出CSV
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  • 收稿日期:  2022-11-01
  • 刊出日期:  2024-03-31

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