混凝土中的Cl-质量分数和含水状态对探地雷达信号的影响OA
Influence of Cl-mass fraction and moisture state in concrete on ground penetrating radar signals
为探究混凝土含水状态及氯离子(Cl-)对探地雷达(GPR)信号的影响及其耦合作用规律,制备不同 Cl-质量分数的干燥与饱和混凝土样品,采用 1.6 和 2.6 GHz 天线进行探测,分析由水和 Cl-变化引起的混凝土电磁参数变化对雷达波传播的影响,并识别对二者最为敏感的雷达信号属性.结果表明,直达波振幅与样品实测平均 A 扫描的连续小波变换(CWT)能量峰值均随着 Cl-质量分数增加而呈下降趋势,且 1.6 GHz 频率下对 Cl-质量分数变化的敏感性高于 2.6 GHz.水的存在增强了雷达信号对Cl-质量分数变化的响应能力;而在干燥条件下,CWT 能量峰值对 Cl-质量分数变化表现出最为敏感的响应特征.
In order to explore the influence of concrete water content and chloride ion(Cl-)on ground penetrating radar(GPR)signal and its coupling law,dry and saturated concrete samples with different Cl-mass fractions were prepared in this study,and 1.6 and 2.6 GHz antennas were used for detection.The influence of the change of electromagnetic parameters of concrete caused by the change of water and Cl-on radar wave propagation was analyzed,and the most sensitive radar signal properties to the two were identified.The results show that the direct wave amplitude and the measured average A-scan continuous wavelet transform(CWT)energy peak of the sample decrease with the increase of Cl-mass fraction,and the sensitivity to Cl-mass fraction change at 1.6 GHz is higher than that at 2.6 GHz.The presence of water enhances the response ability of radar signal to the change of Cl-mass fraction.Under dry conditions,the peak energy of CWT showed the most sensitive response to the change of Cl-mass fraction.
何百川;洪舒贤;黄祖铭
深圳大学土木与交通工程学院,广东 深圳 518060深圳大学土木与交通工程学院,广东 深圳 518060深圳大学土木与交通工程学院,广东 深圳 518060
建筑与水利
探地雷达Cl-电磁波无损检测混凝土
ground penetrating radarchloride ionelectromagnetic wavenon-destructive testconcrete
《福州大学学报（自然科学版）》 2026 (3)
333-341,9
国家自然科学基金资助项目(U24A20166)
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