Method for hoisting construction girder sections through cables

The invention relates to the field of bridge construction and discloses a method for hoisting construction girder sections through cables. The method includes the steps: erecting a first main cable, a second main cable and a plurality of booms; taking a region at the bottom of each boom to arrange a hoisting device below the first main cable and the second main cable; transporting a to-be-mounted girder section to a hoisting position, and adjusting the to-be-mounted girder section to be perpendicular to the mounting direction; selecting one mounting region with no to-be-mounted girder section, enabling the hoisting device to move above the current mounting region after longitudinally hoisting the to-be-mounted girder section to a position 1-2m above a bridge deck, horizontally rotating the to-be-mounted girder section by 90 degrees, placing the to-be-mounted girder section at a designed elevation, and fixing the to-be-mounted girder section to the current mounting region and the bridge deck to form a mounted section. By adoption of the method for hoisting construction girder sections through cables, manufacturing cost can be reduced, arrangement of a girder section hoisting platform in a main span is avoided, and normal operation of a river channel is guaranteed.