According to the announcement of the National Intellectual Property Administration, Tsinghua University has obtained a patent entitled "A Precast Concrete Box Girder Bridge and Its Construction Method", with authorized announcement number CN110983940B and application date November 2019.

　　The patent abstract shows that the present invention relates to the technical field of bridge construction, and specifically to a precast concrete box girder bridge and its construction method. A precast concrete box girder bridge comprises: precast box girder bodies, of which a plurality are arranged in parallel at intervals; precast concrete slabs, of which a plurality are arranged in parallel at intervals, at least one end of each precast concrete slab being supported on the edge of the flange of a precast box girder body, with a gap reserved between two adjacent precast concrete slabs; and a post-cast concrete layer, filled in the gaps and completely covering the top surfaces of the precast concrete slabs. This enables the post-cast concrete layer, the precast concrete slabs and the precast box girder bodies to form an integral whole, enhancing the integrity of the bridge and improving construction efficiency; moreover, the connections are located on the supporting surfaces of the precast box girder bodies, and the precast box girder bodies provide certain support for the two interconnected precast concrete slabs, further strengthening the connection strength between the various parts of the concrete composite slab box girder bridge.