中国安全科学学报 ›› 2025, Vol. 35 ›› Issue (5): 186-194.doi: 10.16265/j.cnki.issn1003-3033.2025.05.1523

• 安全工程技术 • 上一篇    下一篇

基于FRP-PCM加固的既有病害隧道加固性能评价

许振玉1,2(), 张学朋1,2,**(), 李宁博3, 蒋宇静1,4, 陈红宾4, 刘林胜5   

  1. 1 山东科技大学 露天煤矿灾害防治与生态保护全国重点实验室,山东 青岛 266590
    2 山东科技大学 能源与矿业工程学院,山东 青岛 266590
    3 水利部水利水电规划设计总院,北京 100120
    4 长崎大学 工学研究科,日本 长崎 8528521
    5 青岛地铁集团有限公司,山东 青岛 266555
  • 收稿日期:2025-01-15 修回日期:2025-03-18 出版日期:2025-05-28
  • 通信作者:
    ** 张学朋(1989—),男,山东滨州人,博士,副研究员,主要从事地下工程灾害防控理论与技术方面的研究。E-mail:
  • 作者简介:

    许振玉 (2000— ),男,山东汶上人,硕士研究生,主要研究方向为地下工程灾害防治技术。E-mail:

    蒋宇静, 教授

    蒋宇静, 教授

  • 基金资助:
    国家自然科学基金资助(52109132); 山东省高等学校青年创新团队发展计划(2024KJH065)

Performance assessment of diseased tunnels based on FRP-PCM reinforcement

XU Zhenyu1,2(), ZHANG Xuepeng1,2,**(), LI Ningbo3, JIANG Yujing1,4, CHEN Hongbin4, LIU Linsheng5   

  1. 1 State Key Laboratory of Disaster Prevention and Ecology Protection in Open-pit Coal Mines, Shandong University of Science and Technology, Qingdao Shandong, 266590, China
    2 College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao Shandong, 266590, China
    3 General Institute of Water Resources and Hydropower Planning and Design, Ministry of Water Resources, Beijing 100120, China
    4 School of Engineering, Nagasaki University, Nagasaki 8528521, Japan
    5 Qingdao Metro Group Co., Ltd., Qingdao Shandong 266555, China
  • Received:2025-01-15 Revised:2025-03-18 Published:2025-05-28

摘要: 为提高隧道工程安全运维能力,通过截面极限承载力,实现纤维增强聚合物水泥砂浆基复合材料(FRP-PCM)补强加固既有病害隧道性能的量化评价和选型的量化设计。基于有限差分原理建立隧道损伤模型,开展FRP-PCM补强病害隧道稳定性分析数值试验,根据相关规范作出截面极限承载力曲线(又称M-N曲线)综合评判隧道安全情况,同时,提出M-N曲线风险系数α,实现加固效果的定量化评价,并与工程规范相结合建立FRP型号的设计选型方案。结果表明:衬砌拱顶产生空洞时,通过M-N曲线判断拱顶部位和拱肩部位较危险。当围岩质量越差、衬砌混凝土劣化程度越高、松动压力高度越大时,FRP-PCM方法加固性能越显著;在劣化程度80%、围岩等级V级、松动压力高度19.2 m(2D)的工况条件下,经过不同型号FRP补强后能使衬砌M-N曲线风险系数降低23%~32%,较大提升衬砌的安全性能。基于M-N曲线风险系数,可根据围岩等级、松动压力高度、衬砌损伤情况等因素选择最优FRP型号进行补强加固。

关键词: 既有病害隧道, 纤维增强聚合物水泥砂浆基复合材料(FRP-PCM), 加固性能, M-N曲线, 衬砌病害

Abstract:

In order to enhance the safety and operational maintenance capabilities of tunnels, a quantitative evaluation framework and design methodology for FRP-PCM composite reinforcement in diseased tunnels was established through cross-sectional ultimate bearing capacity analysis. Numerical tests were conducted using the finite difference method to analyze the stability of FRP-PCM-reinforced diseased tunnels. Tunnel safety assessment was performed based on the sectional ultimate bearing capacity curve, commonly referred to as the M-N curve. A safety factor α of the M-N curve was proposed to enable a quantitative evaluation of the reinforcement effect. Based on this framework, a design and selection scheme for FRP was established, incorporating tunnel design specifications. The analysis reveals that when cavities exist at the crown of the tunnel, both the crown and shoulders exhibit higher risk levels according to the M-N curve. Furthermore, under conditions of poorer surrounding rock quality, greater lining concrete deterioration, and increased loosening pressure height, the reinforcing effect of the FRP-PCM method becomes more significant. For cases with an 80% degradation degree, Class V surrounding rock, and a loosened pressure height of 2D, the application of different types of FRP reinforcement reduces the safety factor of the M-N curve by 23%-32%, thereby significantly improving the structural safety of the lining. By leveraging the M-N curve's safety coefficient, an appropriate FRP type can be selected for defective lining reinforcement based on factors such as rock quality, loose pressure height, and lining conditions.

Key words: diseased tunnel, fiber-reinforced polymer cement mortar (FRP-PCM), reinforcement, M-N curve, lining diseases

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