The Application of Reinforced Concrete Slab Ground Penetrating Radar
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摘要: 模拟混凝土中的典型情况设计制作了三块厚度为200 mm的钢筋混凝土板, 对板件应用美国GSSI公司生产的Handy scan地质雷达进行了无损检测, 将检测得到的信号应用雷达信号处理软件Radan进行分析, 研究了各种典型情况的雷达反射波图像典型特征, 总结了图像特征的规律; 检测结果表明, 使用中心频率为1 GHz的雷达可以分辨出钢筋的位置、保护层厚度以及可分辨钢筋的最小间距, 钢筋的最大检测深度等, 雷达检测的分析结果表明, 本试验中所采用的雷达设备, 可以精确探测混凝土体中的物体位置, 具有较高的可信度。Abstract: Three 200mm thick reinforced concrete slabs were designed and made with typical simulated circumstance. Non-destructive test carried out on the slabs with different ages by using ground penetrating radar of Handy scan produced by GSSI company of United States. The software Radan was used for processing the detected radar signal. The characteristics of the radar image were studied and summarized; test results showed that radar with the center frequency of 1 GHz could identify the location of steel bars, protective layer thickness and the minimum distance and maximum depth of steel bars. The analysis results indicated that radar equipment used in the test could accurately detect objects location in the concrete with high credibility.
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