Combination layer for expansion joint of simply supported girder bridge, expansion joint structure and simply supported girder bridge

The utility model belongs to the technical field of bridge construction, and particularly relates to a combined layer for a simply supported girder bridge expansion joint, an expansion joint structure and a simply supported girder bridge, the combined layer comprises a stiffening plate, a lubricating layer and an asphalt layer, the combined layer provided by the utility model has better toughness and can well prevent cracking and bulging, and the asphalt layer is flush with the original bridge deck pavement, so that the whole bridge deck pavement layer is kept continuous, and the driving comfort is greatly improved. And the lubricating layer is arranged, so that the combined layer can slide within a certain range in the vehicle driving process, and the risk of cracking of the combined layer can be reduced. The expansion joint structure comprises the expansion joint arranged between the two adjacent ends of the two adjacent spans of the simply supported girder bridge and the combined layer arranged at the expa