【摘要】 介绍探地雷达技术应用于混凝土结构无损检测的原理,针对其在确定钢筋直径以及钢筋笼中单根钢筋位置的检测难点,制作了一块带有多根单独钢筋及双层钢筋网的混凝土板,并使用1.2GHz的雷达天线采用反射法对板进行了检测。检测结果表明,雷达可以分辨出双层钢筋的位置,并给出估计钢筋直径的方法以及可分辨钢筋的最小间距。更多还原

【Abstract】 The principle of the ground penetrating radar (GPR) for testing concrete structure was presented. To overcome the difficulty in determining the diameter and location of a REBAR embedded in concrete, a special concrete slab with single REBAR and double-layered REBAR meshes was made and tested by reflection method with 12GHz antennas. Results showed that double-layered REBARs could be located by GPR. The assessment method for REBAR diameter and the minimum REBAR spacing tested were given.更多还原