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小尺寸模型在五峰隧道涌突水判别中的应用

徐啸川 徐光黎 林高炜 李溢渊 马郧

徐啸川, 徐光黎, 林高炜, 李溢渊, 马郧. 小尺寸模型在五峰隧道涌突水判别中的应用[J]. 地质科技通报, 2023, 42(6): 42-52. doi: 10.19509/j.cnki.dzkq.2022.0149
引用本文: 徐啸川, 徐光黎, 林高炜, 李溢渊, 马郧. 小尺寸模型在五峰隧道涌突水判别中的应用[J]. 地质科技通报, 2023, 42(6): 42-52. doi: 10.19509/j.cnki.dzkq.2022.0149
Xu Xiaochuan, Xu Guangli, Lin Gaowei, Li Yiyuan, Ma Yun. Application of a small-scale model test in distinguishing of water inrush in the Wufeng Tunnel[J]. Bulletin of Geological Science and Technology, 2023, 42(6): 42-52. doi: 10.19509/j.cnki.dzkq.2022.0149
Citation: Xu Xiaochuan, Xu Guangli, Lin Gaowei, Li Yiyuan, Ma Yun. Application of a small-scale model test in distinguishing of water inrush in the Wufeng Tunnel[J]. Bulletin of Geological Science and Technology, 2023, 42(6): 42-52. doi: 10.19509/j.cnki.dzkq.2022.0149

小尺寸模型在五峰隧道涌突水判别中的应用

doi: 10.19509/j.cnki.dzkq.2022.0149
基金项目: 

湖北省重点研发计划项目 2021BCA219

详细信息
    作者简介:

    徐啸川(1988—), 男, 现正攻读土木工程专业博士学位, 主要从事岩土工程、地质灾害防治等方面的研究工作。E-mail: 993642890@qq.com

    通讯作者:

    徐光黎(1963—), 男, 教授, 博士生导师, 主要从事岩土力学、地质灾害等方面的教学与研究工作。E-mail: xu1963@cug.edu.cn

  • 中图分类号: U453.6

Application of a small-scale model test in distinguishing of water inrush in the Wufeng Tunnel

  • 摘要:

    岩溶隧道的涌突水问题对于隧道安全性存在着较大影响。以宜来高速五峰隧道为研究对象, 通过现场水文地质调查、钻孔水位与降雨量观测、数值模拟并结合室内小尺寸模型试验对隧道涌突水的风险进行了判别。试验结果显示隧道涌突水风险主要受到岩溶管道与隧道相对空间位置和管道水压的影响, 当试验水压为0.2 MPa时, 随着隧道上覆土体的厚度增加能够有效地减小渗流作用对隧道的影响, 但随着水压的增大, 管道水的渗流不单以垂直渗流为主, 还包括水平向的渗流, 水压的增大使隔水层中的断续裂隙发生扩展, 从而使隧道产生涌水破坏; 数值模拟结果显示五峰隧道在拱顶和拱肩处剪力最大, 在地下水渗流的条件下容易形成沿着拱顶和拱肩处的拉剪破坏, 隧道涌突水是剪应力场与渗流场耦合作用下的结果。隧道涌点水破坏的首要因素为水压并与隔水岩盘的厚度息息相关。

     

  • 图 1  五峰隧道岩溶水系统平面图

    D2-3y.云台观组;S1lr.罗惹坪组;P1q.栖霞组;P1l.梁山组;D3h.黄家蹬组;S1-2s.纱帽组;D3C1x.写经寺组;YK64为隧道右线64 km处

    Figure 1.  Karst hydrogeologic map of the Wufeng Tunnel

    图 2  五峰隧道纵断面图

    Figure 2.  Cross section of the Wufeng Tunnel

    图 3  五峰隧道与岩溶管道关系图

    Figure 3.  Relationship between the Wufeng Tunnel and karst channel

    图 4  五峰隧道钻孔水位及降雨量与时间关系曲线图

    Figure 4.  Relationship between borehole water level and rainfall in the Wufeng Tunnel

    图 5  岩溶隧道突水试验监测系统

    Figure 5.  Water inrush test monitoring system in a karst tunnel

    图 6  试验装置图

    Figure 6.  Diagram of experimental device

    图 7  不同工况条件下模型位移随水压大小的变化规律

    Figure 7.  Displacement of the model under different water pressures

    图 8  渗流作用下的隧道受力模型

    a.隧道的半径(m); θ.应力和隧道水平方向夹角(°); r0.损伤区半径(m); b.弹性区半径(m); P0.原岩垂直应力(kPa); r.应力计算点到隧道中心的计算距离(m); σr.岩体某点的径向应力(kPa); p.自重应力(kPa); σθ.岩体某点的切向应力(kPa); βp.岩体某点的剪切应力(kPa)

    Figure 8.  Stress model of the tunnel under seepage

    图 9  室内试验数值模拟结果

    Figure 9.  Results of indoor numerical simulation

    图 10  实际工程数值模拟对比结果

    Figure 10.  Comparison of numerical simulation of the actual projects

    图 11  隧道涌突水破坏进程

    Figure 11.  Damage process of water inrush in a tunnel

    图 12  岩溶管道对五峰隧道影响情况图

    Figure 12.  Influence of the karst pipeline on the Wufeng Tunnel

    表  1  设计工况

    Table  1.   Design conditions

    工况 监测点位置 岩溶管道与隧道的空间位置关系及水压情况
    工况1 测点1
    测点2
    测点3
    岩溶管道位于拱顶正上方5 cm处,且水压分别为0.2, 0.4, 0.6, 0.8 MPa时围岩的位移情况
    工况2 测点1
    测点2
    测点3
    岩溶管道位于拱顶正上方10 cm处,且水压分别为0.2, 0.4, 0.6, 0.8 MPa时围岩的位移情况
    工况3 测点1
    测点2
    测点3
    岩溶管道位于拱顶正上方20 cm处,且水压分别为0.2, 0.4, 0.6, 0.8 MPa时围岩的位移情况
    工况4 测点1
    测点2
    测点3
    岩溶管道位于拱腰右侧5 cm、垂直方向10 cm处,水压分别为0.2, 0.4, 0.6, 0.8 MPa时围岩的位移情况
    下载: 导出CSV

    表  2  数值模拟参数

    Table  2.   Table of numerical simulation parameters

    单轴抗压强度/MPa 泊松比 密度/(kg·m-3) 完整岩石材料常数 弹性模量/GPa 扰动因子 地质强度指数
    32 0.22 2 670 8 25 0.55 35
    下载: 导出CSV
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  • 收稿日期:  2022-01-20
  • 录用日期:  2022-04-29
  • 修回日期:  2022-04-15

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