Railway simply-supported T-beam combined sidewalk structure provided with sound barrier

The utility model provides a railway simply-supported T-beam combined sidewalk structure with a sound barrier, which relates to the technical field of bridge parts and comprises a prefabricated ballast retaining wall and a steel cross beam. A vertically-downward embedded sleeve is arranged on the upper surface of the prefabricated ballast blocking wall, a transverse embedded sleeve is arranged on the side face, close to the center of the bridge floor, of the prefabricated ballast blocking wall, and the upper surface of the prefabricated ballast blocking wall is connected with a steel box in a matched mode through the embedded sleeves and bolts. The steel cross beam is connected with the side face, away from the center of the bridge deck, of the prefabricated ballast blocking wall, a cable trough and a sound barrier base are installed on the upper surface of the steel cross beam, and the cable trough is located between the sound barrier base and the steel box. By means of the mode that the prefabricated ballas