US Patent 7874036 Energy storage bridge

An energy storage bridge includes a plurality of bridge girders. The bridge girder includes a number of steel pipes and a plurality of web plates. The steel pipes are assembled either in a single row or in multiple rows in the structural depth direction to form the girder together with the web plate welded between the two halves of the pipe; or with two web plates welded to each side of the pipe. The bridge girder forms an energy storage unit between two consecutive movement joints of the bridge, and two consecutive storage units can be joined by high pressure flexible pipe to form a giant energy storage unit.