THROUGH SOLID BRIDGE SPAN STRUCTURE ERECTION METHOD (VARIANTS) Russian patent published in 2006 - IPC E01D21/10 

FIELD: methods or apparatus specially adapted for erecting or assembling bridges.

SUBSTANCE: method involves arranging scaffold supported by the first permanent pier and temporary piers in the first span; mounting anchor part of span structure on the scaffold with the use of land-based crane; mounting the next spans extending for the full cross-section in cantilever manner with the use of erecting crane along with reducing cantilever end bending on intermediate piers. Method also includes installing anchor part of span structure assembled as cantilever in design position and resting the anchor part upon permanent piers; mounting movable scaffold of upper belt and movable scaffold of lower belt on anchor part belts; mounting the first panels extending for the full cross-section and for length equal to 2/5 of span length in the next span in cantilever manner; assembling remainder panels occupying 3/5 of span structure and extending for part of cross-section in the second span without cantilever usage and assembling orthotrophic roadway panels along with arranging mounting joints of upper belt; installing permanent piers and bending reduction means in design position on the third pier; returning the erection crane and upper belt scaffold in zone of belts extending for part of cross-section; lifting support unit for span structure on the third support with the use of bending reduction means to unload upper belt and to reduce to zero strain in the first preassembled panel extending for part of cross-section; demounting mounting joints of upper belt of the first panel extending for part of cross-section with the use of erection crane; mounting and welding orthotrophic roadway panels; moving erection crane and upper belt scaffold to next station and reducing console bending along with unloading strain forces from upper belt extending for part of cross-section in panels; mounting and welding next orthotrophic roadway panels; returning support unit of the third pier into design position and repeating above span structure erection operations to erect next spans. Additional crane is used for span structure erection.

EFFECT: increased efficiency, reduced constructional depth and vertical rigidity.

2 cl, 9 dwg