实验技术与管理
實驗技術與管理
실험기술여관리
EXPERIMENTAL TECHNOLOGY AND MANAGEMENT
2014年
2期
53-56,59
,共5页
王茜%韩庆邦%赵胜永%朱昌平%徐杉
王茜%韓慶邦%趙勝永%硃昌平%徐杉
왕천%한경방%조성영%주창평%서삼
波纹管%注浆缺陷%超声检测%合成孔径技术
波紋管%註漿缺陷%超聲檢測%閤成孔徑技術
파문관%주장결함%초성검측%합성공경기술
prestressed duct%prestresed duct defect%ultrasonic testing%synthetic aperture technique
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。
波紋管孔道壓漿是橋樑建造後張法的關鍵工序之一，其壓漿密實性的好壞對橋樑的耐久性有著重要影響。利用超聲波反射法穫取迴波信號，從信號能量的角度齣髮，通過分析、處理包含缺陷信息的迴波信號，進行混凝土缺陷的無損檢測。分析併建立瞭閤理的波紋管缺陷超聲檢測的模型，應用閤成孔徑技術，將低成本的小孔徑、低功率換能器接收到的較弱的迴波信號進行閤成，從而起到瞭增彊缺陷信號、抑製譟聲信號的效果。
파문관공도압장시교량건조후장법적관건공서지일，기압장밀실성적호배대교량적내구성유착중요영향。이용초성파반사법획취회파신호，종신호능량적각도출발，통과분석、처리포함결함신식적회파신호，진행혼응토결함적무손검측。분석병건립료합리적파문관결함초성검측적모형，응용합성공경기술，장저성본적소공경、저공솔환능기접수도적교약적회파신호진행합성，종이기도료증강결함신호、억제조성신호적효과。
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 .
