摘要
采用冲击回波法、雷达法及超声CT对装配式混凝土结构叠合构件结合面缺陷检测进行试验研究。考虑缺陷深度、类型等参数,共设计制作了4个试验构件。采用IE-Scanner扫描式冲击回波仪、PS1000混凝土透视仪、A1040 MIRA混凝土超声断层扫描仪分别对4个试验构件结合面缺陷进行检测,并通过钻芯进行验证。试验结果表明,冲击回波法和超声CT均能检测叠合构件结合面的缺陷,其中超声CT还能准确定位缺陷的埋置深度,而雷达仅能检测到不位于钢筋下的结合面缺陷。实际叠合构件缺陷检测时,应首先采用扫描式冲击回波仪进行大范围快速检测,初步确定缺陷位置,然后采用超声CT对缺陷大小及埋深进行详细检测。
Experiments on defects existed on the joints of composite components for precast concrete structures were carrying out using impact echo method,radar and ultrasonic tomography technology(ultrasonic CT for short).Considering the types and depth of defects,four specimens were designed and tested using IE-Scanner impact echo instrument,PS1000 concrete perspective instrument and A1040 MIRA concrete ultrasonic tomography.Then the detection results were verified by drilled core method.The testing results show that both impact echo method and ultrasonic CT could detect the defects existed on the joints,and the ultrasonic CT could pinpoint the depth of the defects.radar could only detect the defects that are not located under the reinforcement.In actual testing works,combing impact echo method and ultrasonic CT could detect the defects existed on the joints of composite components quickly and accurately.
作者
崔珑
刘文政
张效玲
CUI Long;LIU Wen-zheng;ZHANG Xiao-ling(Shandong Academy of Building Research Co.Ltd.,250031,Ji'nan,China;Shandong Win Bond Construction Group Co.Ltd.,250098,Weifang,Shandong,China)
出处
《建筑技术》
2021年第11期1352-1354,共3页
Architecture Technology
关键词
装配式混凝土结构
叠合构件
缺陷
冲击回波法
超声CT
precast concrete structures
composite components
defects
impact echo method
ultrasonic CT
