波纹管注浆缺陷超声检测方法  

An ultrasonic method for prestressed duct defect detection based on synthetic aperture technique

作　　者：王茜[1] 韩庆邦[1] 赵胜永[1] 朱昌平[1] 徐杉[1] 

机构地区：[1]河海大学江苏省输配电装备技术重点实验室,常州市传感网与环境感知重点实验室,江苏常州213022

出　　处：《实验技术与管理》2014年第2期53-56,59,共5页Experimental Technology and Management

基　　金：国家自然科学基金项目(11274091,11274092);河海大学中央高校基本科研业务费项目(2011B11014)资助;常州市项目(CJ20120025)

摘　　要：波纹管孔道压浆是桥梁建造后张法的关键工序之一,其压浆密实性的好坏对桥梁的耐久性有着重要影响。利用超声波反射法获取回波信号,从信号能量的角度出发,通过分析、处理包含缺陷信息的回波信号,进行混凝土缺陷的无损检测。分析并建立了合理的波纹管缺陷超声检测的模型,应用合成孔径技术,将低成本的小孔径、低功率换能器接收到的较弱的回波信号进行合成,从而起到了增强缺陷信号、抑制噪声信号的效果。The prestressed duct grouting is one of the key processes of building post-tensioned concrete structures .The compactness of prestressed duct grouting has an important impact on the durability of the bridge .The echo signal is mainly obtained via the supersonic reflection method ,and then the compactness of grouting is detected based on the energy of above signal . A model of ultrasonic testing is analyzed and established ,which is suitable for prestressed duct defect detection .Furthermore ,with small destructive ,safe and economical synthetic aperture technique , the simulation results demonstrate that the defect signal is enhanced and the azimuth resolution is improved .

关 键 词：波纹管 注浆缺陷 超声检测 合成孔径技术 

分 类 号：U445.57[建筑科学—桥梁与隧道工程] TB551[交通运输工程—道路与铁道工程]