Three-way beam falling prevention device

The invention discloses a three-way beam falling prevention device, which comprises a conical barrel, a flange plate, an anchoring nail and a limiting rod, wherein the conical barrel is contained in an open hole in the bottom of a main beam; the flange plate is fixedly connected with the conical barrel; one end of the anchoring nail is fixed to the outer surface of the conical barrel, and the other end of the anchoring nail is poured into the main beam; the top of the limiting rod penetrates through the conical barrel and then is fixed to the flange plate; and the bottom of the limiting rod isinserted into a hole reserved in a pier and fixed. The device is ingenious in conception, relative displacement between the upper structure and the lower structure of the bridge in the longitudinal direction, the transverse direction and the vertical direction under the action of an earthquake can be effectively limited while normal displacement of the main beam in the operation stage is not affected, the probability of