超声波技术在桩身完整性检测中的应用  

Application of Ultrasonic Technology in Pile Body Integrity Detection

作　　者：李波 LI Bo(Zhuhai Traffic Engineering Quality Monitoring Station,Zhuhai Guangdong 519070,China)

机构地区：[1]珠海市交通工程质量监测站,广东珠海519070

出　　处：《交通节能与环保》2023年第5期223-226,共4页Transport Energy Conservation & Environmental Protection

摘　　要：本文介绍了超声波检测桩基完整性的理论基本原理以及声学参数在混凝土缺陷中的变化情况,阐述了现场实际检测方法、零声时校准、首波正确信号的认知以及现场测试常见问题,总结得出了通过声速、波幅、PSD判据、实测波形、主频(或频谱)等基本物理量来综合判断桩身混凝土的缺陷,列举了实际检测过程中常遇到的桩底沉渣和Ⅱ类桩的信号曲线分析。实践证明,采用超声波技术检测桩身完整性能形象直观地判断混凝土的缺陷位置及大小。This paper introduces the theoretical principle of ultrasonic pile foundation integrity and the change of acoustic parameters in concrete defects,and expounds the actual detection method,calibration at zero sound,recognition of first wave correct signal and common problems of field test.The terms of the sound velocity,the amplitude,the PSD criterion,the main frequency(or the spectrum).The signal curve analysis of pile bottom sediment and class pile often encountered in the actual detection process is listed.It is practically proved that ultrasonic technology is used to detect the complete performance of pile body and judge the defect position of concrete.

关 键 词：超声波 首波 混凝土缺陷 应用实例 

分 类 号：U443.16[建筑科学—桥梁与隧道工程]