ERECTION METHOD OF BRIDGE

PROBLEM TO BE SOLVED: To provide an erection method of a bridge capable of increasing the work efficiency of erection in the erection method of bridge construction work including the extension work of a main girder and the foundation work and the erection of a pier and a main girder leg head by using girders. SOLUTION: A pair of right and left girders 50 installed on the main girder 14 during the erection work are used to carry out the work of the extension of the main girder 14 in a predetermined span S4, the foundation work 16C at the front end of a preceding span S5 adjacent to the forward side, the pier 12C and the main girder leg head 14C. The work such as the foundation work 16C or the like is carried out by installing an excavator 70 and a portal crane 72 in sites adjacent to front ends of both the girders 50. In that case, in order to ensure sufficient supporting strength, a pylon 54 is installed at the front end of the predetermined span S4 at each girder 50, and a fore-stay 56 is slantly hung between the pylon 54 and a predetermined site of the preceding span S5 in each of both girders 50. Accordingly, there is no need to install a strut in the vicinity of the front end of the preceding span S5 as usual to eliminate an installation manhour. COPYRIGHT: (C)2004,JPO&NCIPI