钢筋混凝土试块中空洞病害雷达图像特征规律分析  

Analysis of GPR Image Characteristics of Voids under Different Conditions in Concrete Test Block

作　　者：任秋阳 王艳辉[1,2,3,4] 丁冠军 徐杰[1,2] 崔广炎[1,2] REN Qiuyang;WANG Yanhui;DING Guanjun;XU Jie;CUI Guangyan(School of Traffic and Transportation,Beijing Jiaotong University,Beijing 100044,China;State Key Laboratory of Advanced Rail Autonomous Operation,Beijing Jiaotong University,Beijing 100044,China;Beijing Research Center of Urban Traffic Information Sensing and Service Technology,Beijing Jiaotong University,Beijing 100044,China;Research and Development Center of Transport Industry of Technologies and Equipment of Urban Operation Safety Management,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学交通运输学院,北京100044 [2]北京交通大学先进轨道交通自主运行全国重点实验室,北京100044 [3]北京交通大学北京市城市交通信息智能感知与服务工程技术研究中心,北京100044 [4]北京交通大学城市轨道交通运营安全管理技术及装备交通运输行业研发中心,北京100044

出　　处：《铁道学报》2025年第4期174-184,共11页Journal of the China Railway Society

基　　金：中央高校基本科研业务费(2024YJS143)。

摘　　要：针对目前研究对空洞病害雷达图像特征规律分析不足的问题,构建足尺寸钢筋混凝土试块物理模型,模拟隧道衬砌空洞病害。基于雷达图像特征,提出空洞病害量化分析方法,并利用探地雷达检测不同工况下的空洞病害,得出衬砌空洞病害雷达图像特征规律。研究结果表明:在无内部填充物的情况下,最大振幅A_(T),能量E_(T)和IMF1分量与构建的空洞尺寸呈正相关;含水情况下,最大振幅A_(T),能量E_(T)与IMF1分量提高,且与构建的空洞尺寸呈负相关;几何结构不规则的空洞呈现的深度近似于下底面相似的具有相同长度的等体积几何结构规则空洞的深度,其误差小于5%;水与不密实病害的内部介质会使空洞呈现在图像上的位置向下偏移,深度分别提高8%与30%以上。Aiming at the problem of insufficient analysis of the radar image characteristics of void defects in current research,a full-size reinforced concrete specimen physical model was constructed to simulate the tunnel lining void defects.Based on the radar image characteristics,a quantitative analysis method for void defects was proposed.Ground-penetrating radar(GPR)was used to detect the void defects under different working conditions,thereby obtaining the characteristic law of lining void defects in radar images.The results show that,in the absence of internal fillers,the maximum amplitude,energy and IMF1 component are positively correlated with the constructed void size.In the case of water content,the maximum amplitude,energy and IMF1 component increase,and are negatively correlated with the constructed void size.The depth of geometrically irregular voids is approximated to the depth of isovolumetric regular voids with a similar bottom surface,with an error of less than 5%.The depth of water and the internal medium with no water and the internal medium of a dense lesion shift the position of the voids presented on the image downwards,increasing the depth by more than 8%and 30%,respectively.

关 键 词：地质雷达 空洞病害 物理模型试验 混凝土试块 特征规律分析 

分 类 号：U25[交通运输工程—道路与铁道工程]