BRIDGE FRAMEWORK REPLACEMENT METHOD Russian patent published in 2005 - IPC

FIELD: bridge building.

SUBSTANCE: proposed method of replacement of bridge framework includes mounting of existing bridge framework to be demounted onto floating supports with subsequent disassembling of frame using at least one traveling load-lifting crane, loading of disassembled of framework on watercraft, carrying them to bank and mounting of new bridge framework. Novelty is that cross shifting of framework to be demounted is done, new bridge framework is mounted, two floating supports are brought under bridge framework to be demounted and as bridge framework members are being demounted, each floating support at side of demounted section after demounting of said section is moved along demountable bridge framework and is set behind second floating support. Demounting of sections of existing framework is done from top to bottom by cutting out linear members of upper belt, then posts, hangers, braces and then members of lower belt.

EFFECT: improved reliability, reduced expenses, labor input and time taken for replacement of bridge framework owing to demounting of bridge framework from one side with use of movable floating supports for resting of bridge framework to be demounted.

5cl, 6 dwg