钢桥面铺装层粘接强度超声波无损检测技术研究

Research on the Ultrasonic Non-destructive Test Technology of Bonding Strength for the Steel Bridge Deck Pavement Layer

根据超声波理论,提出利用超声反射法对钢桥面铺装层粘接强度进行无损检测.根据工程实际中常见的5种界面,制作3种类型的相关试样,利用ZBL-520非金属超声仪进行多次检测试验.通过对各界面波形和声学参数的研究,发现可将波幅值作为检测粘接强度评判的物理量.最后选择在同一试样上进行有损、无损界面对比试验.试验结果表明:各界面波幅值存在差异,其中粘接良好的界面波幅值最小,因此可通过大量测点数据的波幅平均值对桥梁某一部分或总体粘结层质量进行评判.

Based on the ultrasonic theory,the ultrasonic reflection method was suggested in the paper as nondestructive testing for steel bridge deck pavement layer bonding strength. According to five kinds of common interfaces in practical engineering,three types of related samples were made,and many detection tests were done by using the ZBL-520 non-metallic ultrasound instrument. By studying the waveform and acoustic parameters of each interface,it was found that the amplitude value could be used as the physical quantity to detect the bonding strength. Finally,the comparative experiments of loss and lossless interfaces were carried out on the same sample. The test results indicated that there were different degrees of differences in the amplitude of each interface,and the good bonding interface ＇s relative amplitude value was the smallest. The quality of bond layer of a part or the total of a bridge could be judged by the average value of a large number of measured point data.