RAHMEN BRIDGE USING ANCHOR AND GIRDER COUPLING CASING, AND CONSTRUCTION METHOD THEREOF

摘要

Provide are an economical Rahmen bridge and a construction method thereof, wherein the Rahmen bridge can reduce the size of a base as compared to a strong connecting method and reduce the material amount of a central girder as compared to a hinge connecting method by using a new connecting method of generating only positive moment by the girder weight and generating negative moment to a corner with respect to upper concrete pouring load and load after synthesis. According to the prevent invention, the construction method of a Rahmen bridge using an anchor and girder coupling casing comprises: a step (a) of constructing both walls to be an abutment or pier by primarily placing concrete and at the same time, installing a girder coupling casing, a casing through anchor inserted into and passing through the girder coupling casing, and a wall connecting anchor positioned close to the girder coupling casing, which are embedded in upper portions of the corresponding walls, respectively; a step (b) of mounting negative moments girders installed with a vertically embedded steel, a support member, and a rear bracket in each of the primarily placed walls, respectively, and loosely fastening a clearance adjustment nut to the casing through anchor and the wall connecting anchor to generate clearance of the clearance adjustment nut; a step (c) of connecting and assembling a positive moment girder between the negative moment girders of both sides to generate a rotational displacement on the negative moment girders of both sides by the girder weight; a step (d) of strongly connecting the negative moment girders and the walls by placing a filling concrete into the girder connecting casing and curing the same after separately removing the clearance generated after the rotational displacement by fastening the clearance adjustment nut; and a step (e) of constructing a floor slab by placing an upper concrete to the negative moment girders and the positive moment girder and curing the same.;COPYRIGHT KIPO 2020