Bolt assembly for improving bridge engineering quality

The invention discloses a bolt assembly for improving bridge engineering quality, and belongs to the technical field of materials for buildings, the bolt assembly comprises a main body module, a fastening module and a standby module, the main body module comprises two connecting pieces, a screw rod is movably inserted between the interiors of the two connecting pieces, and the outer surface of the screw rod is in threaded connection with a nut; a hexagonal block is fixedly connected to one end of the screw rod, the fastening module comprises an annular block which is rotationally connected to one side of the nut and located outside the screw rod, and through arrangement of a hollow groove, the annular block, a movable mechanism, a self-locking mechanism and a resistance spring, after the nut is rotationally installed, the nut is fixed through arrangement of the movable mechanism and the self-locking mechanism; the states of the nut and the screw rod can be automatically locked, so that the nut and the screw r