SAFETY CONSTRUCTION METHOD AGAINST OVERTURNING OF STEEL CROSS BEAM USING PSC CURVED GIRDER

摘要

PURPOSE: An overturning preventive construction method of a curved prestressed concrete girder using a steel cross beam is provided to effectively apply a designed tensional force to a girder by controlling a displacement caused by torsion and overturning moment due to the weight of a curved girder in the introduction of prestress by using a steel cross beam after construction. CONSTITUTION: An overturning preventive construction method of a curved prestressed concrete girder using a steel cross beam comprises the following steps: preparing curved girders (11, 12, 13); temporarily installing a first curved girder in a flat line shape on an abutment or a bride post; repeating the temporary installation of the curved girders to be adjacent to each other in order; obtaining the integrity and overturning preventive properties of the curved girders by joining a steel cross beam (120) to a connection plate (110); joining an n^th curved girder arranged on the outermost side on a curved plane to the steel cross beam of an (n-1)^th curved beam using the connection plate; and placing and curing slab concrete to the temporarily installed curved girder and constructing a bottom slab.