岩土力学 ›› 2020, Vol. 41 ›› Issue (8): 2839-2850.doi: 10.16285/j.rsm.2019.1834

• 测试技术 • 上一篇    

植入式光纤传感器在隧道结构中的边界效应研究

侯公羽1, 2，李子祥1，胡涛1，周天赐1，肖海林1   

  1. 1. 中国矿业大学（北京）力学与建筑工程学院，北京 100083；2. 新疆工程学院 矿业工程与地质学院，新疆 乌鲁木齐 830091
  • 收稿日期:2019-10-25 修回日期:2019-11-28 出版日期:2020-08-14 发布日期:2020-10-18
  • 通讯作者: 李子祥，男，1995年生，博士研究生，主要从事岩石力学及隧道健康监测等方面的研究工作。E-mail: lzx4269016@163.com E-mail: hgyht@126.com
  • 作者简介:侯公羽，男，1965年生，博士，教授，博士生导师，主要从事岩土工程、岩石力学方面的教学与研究工作。
  • 基金资助:
    中央在京高校重大成果转化项目（No. ZDZH20141141301）；国家自然科学基金委员会与神华集团有限责任公司联合资助重点项目（No. U1261212，No. U1361210）

Study on boundary effect of embedded optical fiber sensor in tunnel structure

HOU Gong-yu1, 2, LI Zi-xiang1, HU Tao1, ZHOU Tian-ci1, XIAO Hai-lin1   

  1. 1. School of Mechanics and Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China; 2. School of Mining Engineering, Xinjiang Institute of Engineering, Urumchi, Xinjiang 830091, China
  • Received:2019-10-25 Revised:2019-11-28 Online:2020-08-14 Published:2020-10-18
  • Supported by:
    This work was supported by the Central University Major Achievement Transformation Project in Beijing (ZDZH20141141301) and the National Natural Science Fund Committee and Shenhua Group Co., LTD. Jointly Funded Key Projects (U1261212，U1361210).

PDF (Chinese)

406

PDF (English)

13

摘要： 为探究植入式光纤传感器与隧道衬砌的应变传递的边界效应，分别从理论、试验和现场应用3个方面进行研究，并在实际工程中进行了验证。构建了光纤在混凝土衬砌中的应变传递模型，进行光纤应变传递机制分析，计算了光纤应变传递效率，并与数值计算结果对比，验证了力学计算模型的准确性。使用钢筋混凝土梁模拟隧道的混凝土衬砌，在其表面植入分布式光纤，进行了2组试验。对试验梁进行分级加载并使用BOFDA技术对光纤进行测试。试验结果表明：植入式光纤传感器存在边界效应，结构两端为光纤的低效率应变传递区，不能完全传递试验梁的应变；试验梁中部为光纤的高效率应变传递区，能够完全传递试验梁的应变。基于以上研究成果，在北京市新机场线地铁暗挖隧道CRD工法区间，采用植入式工艺在隧道衬砌内布设了分布式光纤传感器，进行了工程应用研究。监测结果表明，边界效应对工程监测结果影响很小，分布埋入式光纤布设工艺是可行的。该研究可为分布式光纤技术在地下工程结构监测中的应用提供参考。

关键词: 分布式光纤, 耦合性能, 隧道监测, BOFDA技术

Abstract: To explore the boundary effect of the strain transmission between embedded optical fiber sensor and tunnel lining, the study was conducted from three aspects: theoretical, experimental studies and field applications. The results were verified in actual engineering. The strain transfer model of optical fiber in the concrete lining was constructed, and the mechanism of optical fiber strain transfer was analyzed. The strain transfer efficiency of optical fiber was then calculated and compared that with the numerical modeling results, which verified the accuracy of the mechanical calculation model. The concrete lining of tunnel was simulated with the reinforced concrete beams and distributed optical fibers were embedded on the surface of the concrete beams. Two groups of tests were carried out in this study. The test beams were loaded in stages and the optical fibers were tested by BOFDA technology. The test results show that the embedded fiber optic sensor has a boundary effect. The two ends of the beam structure are the low efficiency strain transmission area of the optical fibers, which cannot fully transfer the strain of the test beam. The middle part of the test beam is the high efficiency strain transfer area of the optical fibers, which can completely transfer the strain of the test beam. Based on the research results, the engineering application research was carried out. A distributed optical fiber sensor was installed in the tunnel lining in the CRD construction method section of the subway tunnel of the Beijing New Airport Line using the embedded fiber technology. The monitoring results show that the boundary effect has little influence on the monitoring results. The placement method of the distributed embedded optical fiber is feasible. This research can provide a reference for the application of distributed optical fiber technology in underground engineering structure monitoring.

Key words: distributed optical fiber, coupling performance, tunnel monitoring, BOFDA technology

中图分类号: TU 452
[1] 王勇, 顾凯, 张博, 姜霖, 施斌, . 基于分布式温度测试和重建的浅表土体含水率反演[J]. 岩土力学, 2025, 46(S1): 531-540.
[2] 宋利埼, 章敏, 徐筱, 孙静雯, 俞奎, 李昕尧, . 考虑管片接头转动效应的盾构隧道光纤反演分析[J]. 岩土力学, 2025, 46(8): 2483-2494.
[3] 侯公羽, 张世欧, 崔迪, 陈宏波, 毕立原, 尚宇豪. 分布式光纤传感器在大体积混凝土筏板基础中的耦合性能研究[J]. 岩土力学, 2025, 46(4): 1310-1322.
[4] 俞奎, 章敏, 秦文权, 孙静雯, 张开翔, 宋利埼, . 隧道穿越下埋地管线分布式光纤变形及脱空反演分析[J]. 岩土力学, 2025, 46(3): 894-904.
[5] 许时昂, 张平松, 程刚, 吴海波, 张涛, . 砂土压缩变形传感光缆耦合试验分析与预测模型研究[J]. 岩土力学, 2024, 45(5): 1570-1582.
[6] 刘天翔, 朱鸿鹄, 吴冰, 李豪杰, 胡乐乐, . 埋入式应变感测光缆-冻土界面渐进破坏机制研究[J]. 岩土力学, 2024, 45(1): 131-140.
[7] 高磊, 韩川, 黄坚, 王洋, 周乐, . 基于BOTDR的能源桩现场试验与承载特性分析[J]. 岩土力学, 2022, 43(S1): 117-126.
[8] 高磊, 周乐, 刘汉龙, 黄坚, 王洋, 韩川, . 灌注桩桩身变形高精度测量现场试验研究[J]. 岩土力学, 2021, 42(7): 2004-2014.
[9] 向伏林, 杨天亮, 顾凯, 施斌, 刘春, 刘苏平, 张诚成, 姜月华, . 钻孔全断面分布式光纤监测中光缆-土体变形协调性的离散元数值模拟[J]. 岩土力学, 2021, 42(6): 1743-1754.
[10] 侯公羽, 李子祥, 胡涛, 周天赐, 肖海林, 王凯迪, 胡锦欣, 朱景, . 基于分布式光纤应变传感技术的隧道 沉降监测研究[J]. 岩土力学, 2020, 41(9): 3148-3158.
[11] 侯公羽, 胡涛, 李子祥, 谢冰冰, 肖海林, 周天赐, . 基于分布式光纤技术的采动影响下覆岩 变形演化规律试验研究[J]. 岩土力学, 2020, 41(3): 970-979.
[12] 侯公羽, 谢冰冰, 韩育琛, 胡涛, 李子祥, 杨兴昆, 周天赐, 肖海林, . 分布埋入式光纤与隧道衬砌耦合性能试验及应用[J]. 岩土力学, 2020, 41(2): 714-726.
[13] 侯公羽, 韩育琛, 谢冰冰, 魏广庆, 李子祥, 肖海林, 周天赐, . 定点式布设光纤在隧道结构健康监测中的 预拉应变损失研究 [J]. 岩土力学, 2019, 40(10): 4120-4128.
[14] 侯公羽，谢冰冰，胡 涛，殷姝雅，韩育琛，. 使用BOTDR技术进行隧道监测的光纤护套效应[J]. , 2017, 38(8): 2441-2447.
[15] 苗鹏勇，王宝军，施 斌，张其琪. 特征点压缩算法在分布式光纤桩基检测中的应用[J]. , 2017, 38(3): 911-917.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 《岩土力学》编辑部
地址：湖北武汉武昌小洪山中国科学院武汉岩土力学研究所(430071)　邮编：200042　电话：027-87198484　E-mail: ytlx@whrsm.ac.cn
本系统由北京玛格泰克科技发展有限公司设计开发