基于超声波法的T梁厚度检测方法研究

摘要

In order to do an express test for bridge slab thickness, a research was carried out on detection method of thickness of typical T-beam on bridge by ultrasonic.The detection precision of this detection method was also analyzed in this paper.The results indicate that the maximum measurement error of T-beam diaphragm by ul-trasonic is 3.5%and the maximum measurement error of T-beam web is 16.4%.According to the test results by ultrasonic velocity measurement, this paper focuses on the problem of ultrasonic measurement on bridge slab thick-ness and proposes accuracy correction of ultrasonic velocity measurement on bridge slab thickness.Research results show that ultrasonic velocity measurement on bridge slab thickness has superiority while still existing drawbacks. The difficult and key points of bridge slab thickness test by ultrasonic are how to select positions quickly and im-prove the precision of data processing.%为快速测试桥梁梁板厚度，本研究运用超声波法对典型桥梁T梁梁板厚度检测方法进行研究，并对其检测方法的检测精度进行分析。研究发现超声波测量T梁横隔板边缘测量误差最大为3．5％，T梁中腹板超声波测量误差最大为20％。根据超声波法的测试结果，提出了超声波测试桥梁梁板精度修正的处理方法。研究结果表明超声波在桥梁梁板厚度测试中具有优越性的同时也存在一些问题，如何克服超声波梁板厚度测试快速定点及测试结果数据处理提高精度是超声波梁板厚度测试的难点和关键。