基于冲击回波法的钢衬混凝土内部缺陷探测研究  

Research on Detection of Internal Defects in Steel Lined Concrete Using Impact Echo Method

作　　者：徐宁远 杨建喜 李军[1] 石中文 沙迎春[1] 潘文明 翟俊杰 XU Ning-yuan;YANG Jian-xi;LI Jun;SHI Zhong-wen;SHA Ying-chun;PAN Wen-ming;ZHAI Jun-jie(Nanjing Hydraulic Research Institute,Nanjing 210029,China;Guangdong Yuehai Pearl River Delta Water Supply Co.,Ltd.,Guangzhou 511458,China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]广东粤海珠三角供水有限公司,广东广州511458

出　　处：《水电能源科学》2024年第5期111-116,共6页Water Resources and Power

基　　金：南京水利科学研究院基金项目(Y420014,Y420015);珠江三角洲水资源配置工程课题研究(CD88-GC02-2020-0034);中央级公益性科研院所基本科研业务费专项资金资助(Y423002)。

摘　　要：针对冲击回波法多用于单一结构厚度和缺陷检测且在组合结构缺陷识别领域应用较少的问题,提出了基于冲击回波法检测钢衬混凝土组合结构构件厚度公式。首先采用数值模拟方法探究弹性波在钢衬混凝土内部的传播特性,分析缺陷埋深对冲击回波法特征参数的影响,然后开展室内模型试验研究,进一步验证公式的准确性。结果表明,提出的冲击回波法检测组合结构构件厚度计算公式能较好地适用于钢衬混凝土构件现场检测,现场冲击回波法检测获取的卓越频率可真实反映钢衬混凝土结构混凝土内部质量缺陷。In response to the issue of the impact echo method being primarily utilized for thickness and defect detec-tion in single-medium structures,with limited application in detecting multi-medium structural defects,this paper propo-ses a formula for evaluating the thickness of components in steel-lined concrete composite structures based on the impact echo method.Firstly,numerical simulation was used to investigate the propagation characteristics of elastic waves within steel-lined concrete and analyze the impact of defect depth on the characteristic parameters of the impact echo method.Subsequently,indoor experimental research was conducted to further verify the accuracy of the correction formula.The results indicate that the proposed correction formula for calculating the thickness of steel-lined concrete components in the impact echo method is well-suited for defect detection in such components;The outstanding frequency obtained through impact echo method test can effectively reflect the internal condition of steel-lined concrete components.

关 键 词：钢板衬砌 冲击回波法 无损检测 数值模拟 模型试验 

分 类 号：TV33[水利工程—水工结构工程]