隧道衬砌雷达测试三维信息构建研究  

Study on the Construction of Three Dimensional Information of Tunnel Lining Base Onground Penetrating Radar

作　　者：刘和文[1] 余湘娟[1] 高磊[1] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,岩土工程研究所,南京210098

出　　处：《科学技术与工程》2015年第33期228-232,共5页Science Technology and Engineering

基　　金：河海大学中央高校基本科研业务费专项资金项目(B15020060);中国博士后科学基金项目(2012M511193;2014T70468);江苏省自然科学基金(BK20130832)资助

摘　　要：隧道衬砌的质量对于隧道的安全使用和运营至关重要,因此开展隧道衬砌质量评估具有重要意义。地质雷达(GPR)技术作为新的无损测试技术,能够实现对隧道衬砌质量进行无损监控。由于隧道环境复杂,地质雷达图像存在多解性,本文尝试采用希尔伯特(Hilbert)变换数据处理方法对地质雷达非平稳信号进行分析,提取隧道衬砌结构特征参数,构建隧道衬砌雷达测试三维信息图,绘制出瞬时振幅图、瞬时频率图和瞬时相位图,根据所构建的三维信息特征,结合隧道设计方案和工程地质报告,重点分析了隧道衬砌结构空间分布位置,可能存在的空洞区域,钢构架的空间特征等。研究结果表明,地质雷达测试可以准确的分辨出钢架的空间位置,通过二次数据处理方法,获得衬砌的三维信息,增加了地质雷达图像解读准确性。本文研究成果可为类似隧道衬砌工程提供参考借鉴。The quality of the tunnel lining is very important for the safe and operation of the tunnel. Therefore, it is usefulto carry out the quality evaluation of tunnel lining. As a new non-destructive testing technology, the ground penetrating radar（GPR） technology can monitor the quality of the tunnel lining easily. Due to the complexi- ty of the tunnel environment, the radar images exist multiple explanations. In this paper, the Hilbert transform method is used to process the non-stationary signal analysis of radar, the characteristics parameters of the structure of the tunnel liningare extracted, the three-dimensional maps of tunnel liningare constructed, the diagrams of instan- taneous amplitude, instantaneous frequency and instantaneous phase are drawn. According to the information from the three- dimensional and report of geologicalengineering, the possible void area is analyzed, the steel frame of the spatial characteristics of tunnel lining is obtained. The results show that ground penetrating radar test can accurately distinguish the spatial position of steel frame. The three-dimensionalinformation of lining by secondary data process- ing is given, the accuracy of radar image interpretationis increased. The results can provide a reference for the simi- lar tunnel lining engineering in the future.

关 键 词：隧道衬砌 地质雷达 希尔伯特变换 瞬时振幅 瞬时相位 瞬时频率 

分 类 号：U456.3[建筑科学—桥梁与隧道工程] TU433[交通运输工程—道路与铁道工程]