缺陷桩基声波透射法检测的现场模型试验研究  

Field Model Test Study on Acoustic Wave Transmission Method for Detection of Defective Pile Foundation

作　　者：付罗杰 FU Luojie(Yueyang Transportation Comprehensive Administrative Law Enforcement Detachment Yueyang 414000,China)

机构地区：[1]岳阳市交通运输综合行政执法支队,湖南岳阳414000

出　　处：《广东土木与建筑》2021年第9期85-87,92,共4页Guangdong Architecture Civil Engineering

基　　金：湖南省住房和城乡建设厅建设科技计划项目(KY201918,KY202004)。

摘　　要：灌注桩在施工过程中易发生缩颈、断桩、夹泥、离析等缺陷,为研究声波透射法检测缺陷桩基时声参数偏离正常取值的量值与混凝土缺陷程度之间的对应关系,通过现场模型试验对缩颈、断桩、夹泥、离析等缺陷进行声波透射分析,发现当桩基内部为连续性缺陷时,声学参数会呈现一定的规律,并且可以根据声参数检测值与异常判断临界值的偏离程度判断缺陷的程度及类别。Cast-in-place piles are prone to shrinkage,broken piles,mud,segregation and other defects during the construction process.In order to study the corresponding relationship between the deviation of the acoustic parameters from the normal value in the sound wave transmission method to detect the defective pile foundation and the degree of concrete defects,In this paper,the acoustic transmission analy‐sis of defects such as necking,broken pile,mud,segregation,etc.is carried out through field model tests.It is found that when there are continuous defects inside the pile foundation,the acoustic parameters will show certain rules,and the detection value of the acoustic parame‐ters and abnormal judgments.The degree of deviation of the critical value can judge the degree and category of the defect.

关 键 词：缺陷桩 声波透射法 模型试验 波形特征 

分 类 号：TU473.1[建筑科学—结构工程]