The application relates to the technical field of bridge load experiment, in particular to a bridge
bearing capacity dynamic load experiment detection device. The top end of a supporting frame is fixedly connected with a photosensitive
assembly and a first
laser range finder. A heavy-load vehicle is provided with a reflector plate, the first
laser range finder is horizontal to the reflector plate, the first
laser range finder can measure the horizontal distance a from the center of the hub in the tire through the reflector plate, the front and rear hubs of the heavy-load vehicle are both provided with positioning plates through bolts, one end of each positioning plate is fixedly connected with a connecting shaft, the outer side of the connecting shaft is rotatably connected with first shaft sleeves through bearings, and the two first shaft sleeves are connected with an extension rod. The monitoring mode can avoid installing sensors at various positions of the bridge, saves the equipment and the installation amount, and can realize continuous deflection monitoring. In the application, the axle height curve obtained when the heavy-load vehicle advances is compared with the axle height curve obtained when the heavy-load vehicle advances without load.