超声法检测预制构件混凝土内部缺陷的试验研究

Experimental Research on Ultrasonic Method for Detecting Internal Defects of Precast Concrete

目前混凝土内部缺陷超声检测法主要有传统超声检测法与相控阵列超声检测法。设计制作2组不同缺陷的钢筋混凝土试件,分别采用两种超声法进行对比试验研究。结果表明,阵列超声检测比传统超声检测对混凝土内部空洞检测精度更高;钢筋加密区内部空洞缺陷检测时,钢筋加密区比非加密区检测结果受影响更为明显,且由于钢筋对超声波的干扰,采集到的数据与实际内部情况不完全相符。

At present,there are mainly two kinds of ultrasonic detection methods for concrete internal defects,which are traditional ultrasonic detection method and phased array ultrasonic detection method.Two groups of reinforced concrete specimens with different defects were designed and fabricated,and two kinds of ultrasonic methods were used for comparative test.The results show that array ultrasonic testing is more accurate than traditional ultrasonic testing for the detection of concrete inner cavity.In the detection of cavity defects in reinforced area,the detection results of reinforced area are affected more obviously than those of non-reinforced area,and the collected data are not completely consistent with the actual internal situation due to the interference of reinforcement for ultrasonic waves.