SPAN STRUCTURE ASSEMBLAGE METHOD AND HOISTING DEVICE FOR ABOVE METHOD REALIZATION Russian patent published in 2007 - IPC E01D21/06 

FIELD: bridge building, particularly methods or apparatus specially adapted for erecting or assembling bridges.

SUBSTANCE: method involves ashore assembling span structure on building slipway; advancing thereof to assemblage site by means of floating supports; lifting span structure with the use of hoisting device and installing thereof on permanent piers. Span structure is assembled as subassembly with main trusses without cantilevered roadway panel mounting on extreme panels. Floating supports are moved so that one permanent pier is between main trusses of span structure subassembly and subassembly center of gravity is in line between permanent pier axes. Then hoisting devices are installed on permanent piers of the bridge and after subassembly lifting to design mark subassembly hanged under hoisting device is moved in transversal direction up to longitudinal subassembly axis alignment with that of the bridge. Hoisting device comprises load-bearing frame, lifting hydraulic cylinders, catching means, suspension means and traverse fastened to bridge span subassembly. Transversal cantilevered beams are fixedly secured to permanent pier head. Load-bearing frame freely rests upon cantilevered beams. The cantilevered beams are provided with means for load-bearing frame movement in transversal direction. Cantilevered beams may be provided with beam trussing system located in lower parts thereof.

EFFECT: elimination of temporary support usage for hoisting device supporting and provision of transversal span structure movement with the use of hoisting device.

3 cl, 10 dwg