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基于自感知纤维增强复合材料锚杆的隧道围岩松动圈识别

李锦辉 张俊齐 魏强 贾大鹏 郭东 白石 欧进萍

李锦辉, 张俊齐, 魏强, 贾大鹏, 郭东, 白石, 欧进萍. 基于自感知纤维增强复合材料锚杆的隧道围岩松动圈识别[J]. 西南交通大学学报, 2024, 59(1): 11-19. doi: 10.3969/j.issn.0258-2724.20220003
引用本文: 李锦辉, 张俊齐, 魏强, 贾大鹏, 郭东, 白石, 欧进萍. 基于自感知纤维增强复合材料锚杆的隧道围岩松动圈识别[J]. 西南交通大学学报, 2024, 59(1): 11-19. doi: 10.3969/j.issn.0258-2724.20220003
LI Jinhui, ZHANG Junqi, WEI Qiang, JIA Dapeng, GUO Dong, BAI Shi, OU Jinping. Loose Zone Identification for Surrounding Rock of Tunnels Using Self-Sensing Fiber Reinforced Plastic Anchors[J]. Journal of Southwest Jiaotong University, 2024, 59(1): 11-19. doi: 10.3969/j.issn.0258-2724.20220003
Citation: LI Jinhui, ZHANG Junqi, WEI Qiang, JIA Dapeng, GUO Dong, BAI Shi, OU Jinping. Loose Zone Identification for Surrounding Rock of Tunnels Using Self-Sensing Fiber Reinforced Plastic Anchors[J]. Journal of Southwest Jiaotong University, 2024, 59(1): 11-19. doi: 10.3969/j.issn.0258-2724.20220003

基于自感知纤维增强复合材料锚杆的隧道围岩松动圈识别

doi: 10.3969/j.issn.0258-2724.20220003
基金项目: 中国国家铁路集团有限公司科技研究开发计划(K2020G031)
详细信息
    作者简介:

    李锦辉(1978—),女,教授,博士,研究方向为岩土工程智能监测与诊断,E-mail:jinhui.li@hit.edu.cn

  • 中图分类号: U25

Loose Zone Identification for Surrounding Rock of Tunnels Using Self-Sensing Fiber Reinforced Plastic Anchors

  • 摘要:

    隧道围岩变形和松动圈厚度是隧道结构设计的重要考虑因素和安全运营的重要参考依据,现有的松动圈识别方法和隧道围岩变形测量手段多停留在检测层面,缺乏长期实时监测方法. 为此,研发内嵌光纤的自感知纤维增强复合材料(FRP)锚杆,提出基于内嵌光纤自感知FRP锚杆的隧道围岩智能监测系统,可以实现对围岩变形立体化、全天候的实时监测;结合监测数据与理论分析,提出隧道围岩松动圈的识别方法,并将该智能监测方法应用于广汕高铁陈塘隧道. 研究结果表明:自感知FRP锚杆能够精准探知现场施工对围岩变形的影响规律,型钢钢架对隧道围岩的支护作用较为突出;监测数据可以实时反映自感知锚杆的受力规律,从而准确识别隧道不同位置围岩的松动圈厚度;基于自感知FRP锚杆的隧道围岩智能监测系统将在隧道运营过程中持续、实时监测隧道围岩的变形,为隧道全生命周期的结构安全提供高技术保障.

     

  • 图 1  自感知FRP锚杆及其生产流程

    Figure 1.  Self-sensing FRP anchor and its production flow

    图 2  光纤光栅温度传感器

    Figure 2.  Fiber Bragg grating temperature sensor

    图 3  监测系统安装流程及示意

    Figure 3.  Monitoring system installation process

    图 4  自感知锚杆布置示意

    Figure 4.  Layout of self-sensing anchor

    图 5  锚杆的现场安装与保护

    Figure 5.  Installation and protection of anchor on site

    图 6  数据采集和无线传输系统

    Figure 6.  Data acquisition and remote transmission system

    图 7  M1断面右拱肩锚杆应变

    Figure 7.  Strain of anchor at right spandrel of M1 section

    图 8  M1断面右拱肩处锚杆的轴向应变分布

    Figure 8.  Axial strain distribution of anchor at right spandrel of M1 section

    图 9  M1断面右拱肩处锚杆受力分析

    Figure 9.  Force analysis of anchor at right spandrel of M1 section

    图 10  M1、M2断面左边墙处锚杆轴向应变分布

    Figure 10.  Axial strain distribution of anchors at left wall of M1 and M2 sections

    图 11  M2断面左边墙处锚杆受力分析简图

    Figure 11.  Force analysis of anchor at left wall of M2 section

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出版历程
  • 收稿日期:  2022-01-01
  • 修回日期:  2022-04-28
  • 网络出版日期:  2023-09-13
  • 刊出日期:  2022-05-23

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