THE BRIDGE CONSTRUCTION METHOD OF HAVING USED COMPOSITION DOUBLE GIRDER AND THIS WHICH CONNECTED AND MANUFACTURED I BEAM BY THE UPPER AND LOWER SIDES

摘要

According to the present invention, two I beams of different stiffness or the same are connected up and down to produce a double beam, and only both ends and the parent part are manufactured as a double beam, or both ends and the positive and minor moment parts are all made as a double beam, and a small type The purpose is to provide a double beam fabricated by connecting I beams up and down and bridge construction methods using them.;An upper I beam formed by connecting the I beams up and down in accordance with the present invention for achieving the above object is installed on the upper, upper and lower flanges and the web; It is fixed to the lower flange of the upper I beam, characterized in that consisting of a lower I beam consisting of upper, lower flanges and a web.;In addition, the bridge construction method using the double beam manufactured by connecting the I beam up and down according to the present invention for achieving the above object is by the upper flange of the lower flange of the upper I beam and the upper flange of the lower I beam by welding or welding Manufacturing a double beam; Installing a hydraulic jack for introducing a prestressed load at a predetermined distance from both ends of the manufactured double beams; Welding or bolting the lower flange of the upper I-beam and the upper flange of the lower I-beam of the double beam integrally welded or bolted to each other while applying the prestressed load to the installed hydraulic jack; Removing the loaded prestress load and simultaneously producing a prestressed double beam; The construction of the bridge by sequentially performing the step of mounting the produced prestressed double beams on the alternating and piers.;I beam, upper and lower flange, double beam, bridge