Multifunctional composite expansion joint device for bridge

The utility model provides an expansion joint device for a multifunctional composite bridge, which belongs to the technical field of municipal public engineering, and comprises a comb plate group and a guard plate, the comb plate group comprises a first plate body and a second plate body which are matched in pairs, an adjusting gap is arranged between the first plate body and the second plate body, the guard plate is positioned above the comb plate group, and the first plate body and the second plate body are arranged in parallel. One end of the protective plate is fixed to the first plate body, and the other end of the protective plate extends towards one side of the second plate body to cover the adjusting gap. According to the multifunctional composite expansion joint device for the bridge, the adjusting gap between the first plate body and the second plate body is covered with the protection plate, so that garbage is prevented from entering the device, garbage blockage is avoided, and the service life of