Experimental study on ground penetrating radar in quality inspection of asphalt concrete impervious facing of pumped storage power station

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Li, Xiulin^1,2 ; Hao, Jutao^1,2 ; Wang, Zhengxing^1,2

China Institute of Water Resources and Hydropower Research, Beijing, China^1

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, Beijing, China^2

关键词: Application experiences;    Ground based radar;    Ground Penetrating Radar;    Ground penetrating radar (GPR);    Laboratory verification;    Non destructive testing;    Pavement detections;    Pumped storage power station;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012020/pdf
DOI  :  10.1088/1757-899X/423/1/012020

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

As a new technology of non-destructive testing, the ground penetrating radar (GPR) has the characteristics of non-destructive, accurate, high efficiency and low cost. Based on the successful application experience of GPR in asphalt pavement detection, the feasibility of GPR to detect asphalt concrete impervious facing is proved through laboratory verification, radar forward modelling and field test. Many random blisters and cracks appear in the asphalt concrete impervious facing of the Zhanghewan Pumped Storage Power Station selected for field tests. The detection by the GPR showed that the defects occurred only in the upper anti-seepage layer, and the drainage layer and the lower anti-seepage layer had no obvious defects, which were fully consistent with coring results. Therefore, GPR is a fast, non-destructive and reliable technique for detecting asphalt concrete impervious facing. At present, China is in the period of large-scale construction of pumped-storage power stations, and the demand for rapid inspection and maintenance engineering is also increasing. The method of the ground-based radar will certainly play a greater role in the rapid detection of impervious structural defects in asphalt concrete facings.