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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (6): 1072-1080    DOI: 10.3785/j.issn.1008-973X.2013.06.020
土木工程     
基于光纤传感技术的地铁隧道冻结法施工监测
叶肖伟1,2, 丁朋1,3, 周诚4, 李勇军5, 倪一清1, 董小鹏3
1. 香港理工大学深圳研究院 智能结构健康监测研发中心,广东 深圳 518057;2. 浙江大学 建筑工程学院, 浙江 杭州 310058;3. 厦门大学 信息科学与技术学院光波技术研究所,福建 厦门 361005; 4. 华中科技大学 土木工程与力学学院,湖北 武汉 430074;5. 中铁隧道股份有限公司,河南 郑州 450000
Monitoring of metro-tunnel freezing construction using fiber sensing technology
YE Xiao-wei1,2, DING Peng1,3, ZHOU Cheng4, LI Yong-jun5,NI Yi-qing1, DONG Xiao-peng3
1. Intelligent Structural Health Monitoring R&D Centre,The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen 518057, China; 2. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; 3. Institute of Light-wave Technology, School of Information Science and Engineering, Xiamen University, Xiamen 361005, China; 4. School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China; 5. China Railway Tunnel Stock Co. Ltd., Zhengzhou 450000, China
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摘要：

为了掌握地铁隧道联络通道冻结法施工中冻土的温度场和应力场,提出一种基于光纤布拉格光栅(FBG)传感技术的冻结法施工实时监测方法.在低温潮湿工作环境下,FBG传感器比传统电子式传感器在精度、灵敏度以及稳定性等方面存在较大优势.基于此,首次提出了整合FBG传感器的冷冻监测管设计方案及安装方法.通过在联络通道冻土帷幕左右两侧监测孔内布置FBG传感器,对冻结法施工过程中的冻土温度和应变进行实时监测.根据FBG传感原理并采用小波变换去噪方法对原始温度和应变监测数据进行分析,获得了冻土温度和应变沿厚度和深度方向的分布模式,为进一步认识冻土帷幕的形成和发展规律提供依据.
Abstract:

In order to grasp the temperature and strain fields of frozen soils during freezing construction of the metro-tunnel cross-passage, a method for real-time monitoring of freezing construction using fiber Bragg grating (FBG) sensing technology is proposed. Under the condition of low temperature and high humidity, FBG sensors have the advantages in terms of accuracy, sensitivity and stability in comparison with the traditional electrical sensors. In this connection, the design scheme and installation method of a novel freezing monitoring device integrated with FBG sensors is addressed. FBG sensors are deployed in freezing monitoring holes at both sides of the frozen soil wall of the cross passage to timely monitor the temperature and strain of the frozen soils in the process of freezing construction. The original temperature and strain monitoring data are analyzed based on the FBG sensing principle by use of the wavelet transform de-noising approach. The distribution pattern of the temperature and strain of the frozen soils in thickness and depth directions are recognized, which will provide a basis for further digesting the formation and expansion mechanism of frozen soil walls.
出版日期: 2013-11-22
:  TU 752  
基金资助:

中央高校基本科研业务费专项资金资助项目(2013QNA4023);国家“十二五”科技支撑计划课题资助项目(2012BAK24B01);高等学校博士学科点专项科研基金资助项目(20100142110061).
作者简介: 叶肖伟(1980—)，男，讲师，博士，从事土木工程结构健康监测和安全评估方面的研究.E-mail: cexwye@zju.edu.cn
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引用本文:

叶肖伟, 丁朋, 周诚, 李勇军, 倪一清, 董小鹏. 基于光纤传感技术的地铁隧道冻结法施工监测[J]. J4, 2013, 47(6): 1072-1080.

YE Xiao-wei, DING Peng, ZHOU Cheng, LI Yong-jun,NI Yi-qing, DONG Xiao-peng. Monitoring of metro-tunnel freezing construction using fiber sensing technology. J4, 2013, 47(6): 1072-1080.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.06.020    或    http://www.zjujournals.com/eng/CN/Y2013/V47/I6/1072

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