BRIDGE CONSTRUCTION CRANE FOR INSTALLING A GIRDER IN A CURVED SECTION

摘要

Disclosed is a crane for installing a girder on the upper portion of a pier to construct a bridge. The crane includes: a crane girder constituting the body of the crane; a leg part longitudinally fixed to the crane girder, and including a first leg fixed to a front pier, a second leg installed on the top surface of a preinstalled girder, and a third leg spaced a certain distance from the second leg such that the center of gravity of the crane is located behind the second leg; a rotation member installed on the second leg to rotate the crane girder by a certain angle; and a sliding member installed on the first leg to slide when the crane girder is rotated by a certain angle. Thus, when a girder is installed in a curved section, a change in rotation of about 3° is made about the second leg using a main cylinder and an auxiliary cylinder, thereby making a rotation correction. In addition, the sliding member installed on the first leg facilitates the installation of a girder in a curved section.