基于示踪指示剂的混凝土裂缝深度雷达检测及其性能研究  

Research on Radar Detection of Concrete Crack Depth Using Tracer Indicators and Its Performance Analysis

作　　者：田辉 汤雷[1] 李坡 贾宇[1] 王玉磊 栾品之 张盛行 TIAN Hui;TANG Lei;LI Po;JIA Yu;WANG Yu-lei;LUAN Pin-zhi;ZHANG Sheng-hang(The National Key Laboratory of Water Disaster Prevention,Nanjing Hydraulic Research Institute,Nanjing 210029,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]南京水利科学研究院水灾害防御全国重点实验室,江苏南京210029 [2]天津大学建筑工程学院,天津300072

出　　处：《水电能源科学》2025年第1期57-60,29,共5页Water Resources and Power

基　　金：国家重点研发计划(2021YFC3090104);南京水利科学研究院研究生学位论文创新基金项目(Yy424001);国家自然科学基金项目(52109162);江苏省自然科学基金项目(BK20221192)。

摘　　要：裂缝识别检测在结构健康监测中具有重要意义,对评估工程结构的安全性至关重要。然而,准确检测裂缝深度是一项极具挑战性的任务。对此,提出一种基于混凝土裂缝深度指示剂的雷达可视化检测方法,通过将裂缝空腔检测转化为指示剂检测,实现了裂缝深度的精确识别。研究中配置了一种含有纳米Fe_3O_4强反射成分的裂缝深度指示剂,并构建了大体积沙箱相似物理模型,模拟了指示剂灌入裂缝尖端后的效果,开展了多工况检测试验。结果表明,新型指示剂可检测裂缝的最大深度为90 cm,且随着深度增加,指示误差增大,但最大指示误差不超过5%。相较于传统指示剂,新型指示剂显著提高了裂缝深度的检测能力。The identification and detection of cracks are pivotal in structural health monitoring,crucial for assessing the safety of engineering structures.However,accurately determining crack depth presents a formidable challenge.This study proposes a novel radar visualization method based on a concrete crack depth indicator.By converting the detection of crack voids into indicator detection,this method achieves precise crack depth identification.In this research,a crack depth indicator incorporating nano-Fe3O4,renowned for its robust reflective properties,was developed.A large-scale sandbox physical model simulated the effects of injecting the indicator into crack tips,followed by multiple condition de-tection experiments.The results show that the new indicator can detect cracks up to 90 cm deep;Despite increasing error with depth,the maximum error remains below 5%.Compared to traditional methods,this indicator markedly enhances crack depth detection capabilities.

关 键 词：指示剂 雷达波 指示性能 沙箱模型 指示误差 裂缝深度 可视化 

分 类 号：TV331[水利工程—水工结构工程]