双层钢筋衬砌质量检测正演模拟与试验  

Forward Simulation and Experiment of Quality Inspection for Double⁃layer Reinforced Lining

作　　者：张建民 ZHANG Jianmin(Guoneng Xinshuo Railway Co.Ltd.,Ordos Inner Mongolia 010300,China)

机构地区：[1]国能新朔铁路有限责任公司,内蒙古鄂尔多斯010300

出　　处：《铁道建筑》2023年第9期102-104,共3页Railway Engineering

摘　　要：采用基于时域有限差分法的开源模拟软件gprMax和中心频率1500 MHz的天线对双层钢筋衬砌质量检测过程进行了正演模拟,并制作了双层钢筋衬砌模型进行检测。结果表明:两者雷达图像中钢筋的反射波幅度、相位相似,钢筋均呈现出开口向下的双曲线特征;由于电磁波的趋肤效应,表层钢筋产生多次反射波,导致正演模拟雷达图像中第二层钢筋信号被遮蔽。The open-source simulation software gprMax based on the finite difference time domain method and an antenna with a center frequency of 1500 MHz were used to conduct forward simulation of the quality inspection process of double-layer reinforced lining,and a double-layer reinforced lining model was produced for inspection.The results indicate that,the amplitude and phase of the reflected waves in the two radar images are similar,and the steel bars show a hyperbolic feature with an opening downwards.Due to the skin effect of electromagnetic waves,the surface steel bars generate multiple reflected waves,resulting in the masking of the second layer steel bar signal in the forward simulated radar image.

关 键 词：隧道检测 探地雷达 双层钢筋衬砌 正演模拟 模型试验 反射波 绕射波 趋肤效应 

分 类 号：U457[建筑科学—桥梁与隧道工程]