地质雷达在隧道衬砌质量检测中的应用  

Application of Ground Penetrating Radar in the Quality Detection of a Tunnel Lining

作　　者：韩景阳 HAN Jing-yang(Construction Headquarters of Yichang Expressway,Yixing Jiangsu 214200 China)

机构地区：[1]宜长高速公路建设指挥部,江苏宜兴214200

出　　处：《江苏建筑》2022年第S01期49-51,共3页Jiangsu Construction

摘　　要：地质雷达利用电磁波在介电常数差异界面产生发射的特点,通过分析反射电磁波相位、振幅和同相轴特征,可有效识别被测介质内部存在的缺陷。文章采用地质雷达对宜长高速公路葡萄岭隧道钢筋混凝土二次衬砌结构中的脱空和主筋保护层厚度进行了检测应用,有效识别了存在缺陷的位置,注浆加固后的复测未发现明显电磁反射界面,证明该方法在隧道二次衬砌结构检测中具有良好的效果,为隧道后期安全稳定运营提供了保障。Using the reflected electromagnetic wave at the interface with different dielectric constant, the ground penetrating radar is widely used in the detection of defect by analyzing the phase position, amplitude and event characters. This paper detected the compactness and steel quality of second lining structure,including the cavity between the preliminary bracing support and second support structure, the thickness of the protective layer of reinforcement. The results denote that the above defects can be easily obtained. The reflected electromagnetic wave is not obvious after the grouting reinforcement. The ground penetrating radar can be well used in the nondestructive testing of tunnel supporting structure, and can provide technical support for the stability of tunnel.

关 键 词：隧道 衬砌结构 无损检测 地质雷达 

分 类 号：U452[建筑科学—桥梁与隧道工程]