基于冲击回波法的混凝土厚度测试研究与评价  

Study and Evaluation of Concrete Thickness Using Impact-Echo Method

作　　者：崔德密[1,2] 吕列民 黄从斌[1,2] 杨智 CUI Demi;LYU Liemin;HUANG Congbin;YANG Zhi(Anhui ＆ Huaihe River Institute of Hydraulic Research,Hefei 230088,China;Engineering ResearchCenter for Water Conservancy Project Disease Prevention and Control of Anhui Province,Hefei 230088,China)

机构地区：[1]安徽省水利部淮河水利委员会水利科学研究院,安徽合肥230088 [2]安徽省水利工程病害防治工程技术研究中心,安徽合肥230088

出　　处：《人民黄河》2018年第10期127-130,共4页Yellow River

基　　金：水利部公益性行业科研专项(201101012)

摘　　要：为探求更好的混凝土厚度现场无损检测方法,运用冲击回波仪对不同龄期、不同厚度的素混凝土试件和钢筋混凝土试件进行测试,研究了激振装置、混凝土强度等级、混凝土龄期、钢筋配置对测试结果的影响,提出了冲击回波法评价混凝土厚度的数学模型和评价方法。研究结果表明:激振装置的选择极为关键,正确选择激振装置可有效规避钢筋对构件厚度测试信号的影响,混凝土龄期与冲击回波波速成正相关关系,引入不确定度评定分量使冲击回波法检测混凝土厚度的准确度得到有效保证。In order to explore a better non-destructive testing method for concrete thickness,plain concrete specimens and reinforced concrete specimens of different age and thickness were tested. The impact of vibration device,strength grade of concrete,concrete age and location of reinforcement on test result was studied. Along with mathematical model and assessment methodology of concentrate thickness evaluated by impact-echo method was proposed using the impact-echo instrument. The results show that the election of vibration device is crucial for the reason that the concentrate age and velocity of impact-echo are positively correlated with each other,the impact of concentrate on characteristic signal tested by thickness component may be effectively avoided with correct election of vibration device,and the degree of accuracy of concentrate thickness detected by impact-echo method may be effectively guaranteed by introducing the component of uncertainty evaluation.

关 键 词：冲击回波法 混凝土 厚度检测 评价方法 激振装置 

分 类 号：TU192[建筑科学—建筑理论]