Steel-concrete combined diaphragm structure formed by transversely connecting multiple T-shaped beams and construction method

The invention relates to the technical field of bridge assembly and construction. A steel-concrete combined diaphragm structure formed by transversely connecting a plurality of T-beams comprises a first main beam and a second main beam, wherein the first main beam and the second main beam are oppositely arranged at an interval; a first concrete slab and a second concrete slab; the first welding plate and the second welding plate are respectively provided with a free end and a fixed end; the third fixing assembly is used for fixing the free end of the first welding plate and the free end of the second welding plate; wherein the first concrete plate and the first main beam are jointly poured to form a whole, and the second concrete plate and the second main beam are jointly poured to form a whole; moreover, the fixed end of the first welding plate is embedded in the first concrete plate, and the fixed end of the second welding plate is embedded in the second concrete plate. The construction method has the advan