Integral erection construction method of 60m steel box girder

The invention belongs to the technical field of the construction of large bridge bodies, and specifically relates to an integral erection construction method of a 60m steel box girder, which reduces the influence of the construction of long-span steel box girders to communications and transportation and surrounding structures. The method comprises the following steps of: midspan construction of temporary pillar of steel box girder, steel box girder assembling manufacturing, bridge girder erection machine assembling and checking, hole passing of the bridge girder erection machine, preparation for girder erection of the bridge girder erection machine girder and girder erection, transverse welding among boxes, and bridge girder erection machine dismantling. In the method, a hollow box-shaped double-beam bridge girder erection machine is used for carrying out the construction of the steel box girder so as to efficiently solve the construction problem that the 60m and 230t steel box girder simultaneously spans over railways and roads; and the method ensures the operation safety of the conventional railways and national roads and minimizes the influence of the construction to railways and national roads.