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在采用胀锚螺栓技术时要在钢筋混凝土构件上钻孔。钻孔时需要躲开埋在其中的钢筋、铁管等,否则将损伤钻机,损伤钢筋或铁管,甚至引起事故。这就需要在钻孔前利用金属探测器探明埋在构件中的钢筋和铁管的位置。随着胀锚螺栓的直径增大和钻孔加深,探测器的最大应答距离就应增加,提高灵敏度,要分辨埋得较深的两平行钢筋,就要在保证灵敏度的同时提
In the use of expansion bolt technology to be in the reinforced concrete member drilling. When drilling, it is necessary to avoid the steel bars and iron pipes buried in them, otherwise the drilling rig will be damaged, the steel bars or iron pipes will be damaged, or even an accident may occur. This requires the use of metal detectors before drilling to ascertain the location of the rebar and pipe buried in the component. As the diameter of the expanding anchor bolt increases and the borehole deepens, the maximum response distance of the detector should be increased to increase the sensitivity. To distinguish the two parallel bars buried deeply, it is necessary to ensure that the sensitivity