基于超声波透射法的大型桥梁基桩内部缺陷检测方法  

Detection Method of Internal Defects in Large Bridge Piles Based on Ultrasonic Transmission Method

作　　者：翟晓强 ZHAI Xiaoqiang

机构地区：[1]铁三院(天津)检测科技有限公司,天津300251

出　　处：《重庆建筑》2024年第9期56-58,共3页Chongqing Architecture

摘　　要：常规针对断桩、离析等问题的桥梁基桩缺陷检测方法,往往无法检测出桥梁基桩内部的微小缺陷,不能满足基桩缺陷检测需求。因此,设计了基于超声波透射法的大型桥梁基桩内部缺陷检测方法。提取大型桥梁基桩内部缺陷声波变化特征,根据声波透射法,判断基桩存在的沉渣、孔壁坍塌、混凝土离析等缺陷类别。基于超声波透射法检测桥梁基桩内部缺陷声介质,将缺陷位置与正常混凝土分界面的声介质突变情况进行分析,并将其作为内部缺陷检测的判断指标,从而实现基桩内部缺陷的精准检测。采用实例分析,证明了该方法的检测精准度更高,能够满足基桩缺陷检测需求,应用价值较大。Conventional detection methods for defects in bridge piles,such as broken piles and segregation,often fail to identify minor internal defects,thus unable to meet the requirements for pile defect detection.Therefore,a detection method for internal defects in large bridge piles based on the ultrasonic transmission technique is proposed.This method extracts the acoustic wave variation characteristics of internal defects in large bridge piles and utilizes the ultrasonic transmission technique to identify defect categories including sediment,hole wall collapse,and concrete segregation.By detecting the acoustic medium of internal defects in bridge piles using the ultrasonic transmission technique,the abrupt changes in acoustic medium at the interface between the defect location and normal concrete are analyzed and used as indicators for internal defect detection,thereby achieving precise detection of internal defects in piles.Case studies demonstrate that this method offers higher detection accuracy,meets the requirements for pile defect detection,and has significant application value.

关 键 词：超声波透射法 大型桥梁 基桩 内部缺陷 检测方法 

分 类 号：U446[建筑科学—桥梁与隧道工程]