Geological radar detection pile bottom karst cave protection device

The utility model discloses a geological radar detection pile bottom karst cave protection device which is provided with a protection box, winding and unwinding ropes are arranged at the four corners of the protection box, and ground thorns are fixed to the bottom of the protection box. The radar detector is installed in the protection box, and a sealing protection cover is hinged to the top of the protection box; comprising a movable rod, one end of the movable rod is movably connected with the inner surface of the sealing protection cover, the other end of the movable rod is movably connected with a limiting roller, and the movable rod is connected with the sealing protection cover through a first spring; and the protection plate is movably installed above the sealing protection cover, and the edge of the protection plate is connected with the sealing protection cover through a connecting block. According to the geological radar detection pile bottom karst cave protection device, in the process that a radar