建筑物混凝土结构中钢筋位置检测方法及误差分析

基于理论模型、实物模型和案例测试结果发现，电磁感应法与地质雷达法都可用于钢筋配置检测。经测试结果误差分析，电磁感应法的精度优于地质雷达法，但二者测试结果都满足相关规范要求。不同之处在于，电磁感应法仅能够检测钢筋位置，而地质雷达法在检测钢筋位置的同时兼顾检测混凝土基材质量。地质雷达法检测混凝土中钢筋的映像特征为有规律的连续小月牙形强反射信号，月牙波幅较窄，月牙顶部为钢筋的上部，到混凝土面的距离为保护层厚度；完整的混凝土基材映像特征为反射较弱，波形均匀，同相轴连续。

Detection method and error analysis of reinforcement position in building concrete structure

Based on the theoretical model, physical model and actual case test results, both electromagnetic induction method and geological radar method can be used for reinforcement configuration detection. Through the error analysis of the test results, it is found that the accuracy of electromagnetic induction method is better than that of geological radar method, but both test results meet the requirements of specification. The difference is that electromagnetic induction method can only detect the position of reinforcement, while geological radar method can not only detect the position of reinforcement, but also take into account the quality of concrete substrate. The imaging characteristics of reinforcement in concrete detected by geological radar method are regular and continuous small crescent shaped strong reflection signals, the amplitude of crescent is narrow, the top of crescent is the upper part of reinforcement, and the distance from crescent to concrete surface is the thickness of protective layer. For the complete concrete substrate, the image is characterized by weak reflection, uniform waveform and continuous in-phase axis.