GIRDER BRIDGE CONSTRUCTION METHOD OVER EXISTING BRIDGE

摘要

PURPOSE: A construction method of a girder bridge crossing existing structures is provided to facilitate the installation of a girder between bridge posts if it is difficult to secure a space for the installation of the girder. CONSTITUTION: A construction method of a girder bridge crossing existing structures comprises following steps. Two bridge posts(300:310,320) for a horizontal girder are installed so that an existing structure(100) can be installed therebetween. A temporary bent for a horizontal girder(400) is installed around one bridge post. An extrusion guide member is installed on the upper side of the constructive bent for the horizontal girder. A sliding member is installed on the bottom surface of the horizontal girder(200). A launching nose(230) is installed on the front surface of the horizontal girder. A vertical girder is installed on both sides of the central part of the horizontal girder.