Novel roadbed compactness detection device

The utility model discloses a novel roadbed compactness detection device, which comprises a vertically arranged thin-walled cylinder, a pedal is horizontally arranged on the outer wall of the thin-walled cylinder, a mounting flange is horizontally arranged above the pedal, the mounting flange is fixedly arranged on the outer wall of the thin-walled cylinder, and the thin-walled cylinder is fixedly arranged on the mounting flange. A sliding circular truncated cone is slidably connected in the thin-walled cylinder, and a plurality of loosening needles are fixedly connected to the bottom end of the sliding circular truncated cone in a vertically downward mode; the utility model has the beneficial effects that the structure is simple, the thin-wall-shaped sharp thin-wall cylinder is designed for preliminary positioning and soil surrounding in the test hole, then the aggregate in the thin-wall cylinder is tamped up and down by utilizing the loosening needle to become loose and easy to take out, the test hole is du