超声波检测矩形钢管混凝土密实度研究  

Research on ultrasonic testing of the compactness of rectangular steel tube concrete

作　　者：周占学[1,2] 娄军 梁玉国 贾吉龙 丁秋雨 ZHOU Zhanxue;LOU Jun;LIANG Yuguo;JIA Jilong;DING Qiuyu(HeBei University of Architecture,Zhangjiakou,Hebei 075000;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou,Hebei 075000;Hebei Academy of Building Research,Shijiazhuang,Hebei 050000)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省土木工程诊断改造与抗灾重点实验室,河北张家口075000 [3]河北省建筑科学研究院有限公司,河北石家庄050000

出　　处：《河北建筑工程学院学报》2024年第4期1-6,73,共7页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：河北省建设科技研究项目(2021-2099)。

摘　　要：钢管混凝土结构内部的密实性对钢管混凝土的受力性能影响较大,因此,对钢管混凝土的密实度进行精细化检测具有重要意义。试验设计了6个矩形钢管混凝土试件,基于超声波法,探究了钢管混凝土浇筑时的振捣情况对其密实度的影响。结果表明,经过充分振捣后的试件其波速、振幅和频率值均接近同批浇筑立方体试块的值;未振捣试件的波速、振幅和频率值普遍小于充分振捣试件的值,且未振捣试件的波速、振幅和频率值自钢管顶部至底部逐渐降低。因此,混凝土浇筑时的振捣情况对钢管混凝土结构内部的密实性有较大影响。The compactness inside the steel reinforced concrete structure has a significant impact on the mechanical properties of the steel reinforced concrete.Therefore,it is of great significance to finely detect the compactness of the steel reinforced concrete.Six rectangular steel tube concrete specimens were designed for the experiment,and based on the ultrasonic method,the influence of vibration during the pouring of steel tube concrete on its compactness was explored.The results showed that after sufficient vibration,the wave velocity,amplitude,and frequency values of the specimens were close to those of the same batch of poured cubic specimens,indicating good compactness;The wave velocity,amplitude,and frequency values of un vibrated specimens are generally lower than those of fully vibrated specimens,and the wave velocity,amplitude,and frequency values of un vibrated specimens gradually decrease from the top to the bottom of the steel pipe;The waveform of the un vibrated specimen showed significant distortion compared to the fully vibrated specimen.Therefore,the vibration during concrete pouring has a significant impact on the compactness inside the steel tube concrete structure.

关 键 词：超声波 密实度 波速 振幅 频率 

分 类 号：TU755[建筑科学—建筑技术科学]