CONSTRUCTION METHOD OF CONCRETE ARCH THROUGH BRIDGE COMBINED WITH PRESTRESSED CONCRETE BOX GIRDER

摘要

The present invention relates to a method of constructing a concrete arch bridge between Jangji while supporting the arch rib and the PC concrete box girder integrally stiffening the concrete arch rib integrally on the PC concrete box girder bridge to be constructed.;       The construction method of the concrete arch haro bridge is to install a temporary vent between the long bridge between the pier and the pier is already installed, install the bridge over the bridge and the construction vents, and then push the PC concrete box girder forward to install the bridge While installing a hinge on a bridge installed in the center of the bridge in the axial direction of the bridge deck, the hinges at one end of the semi-arch steel pipes are connected to each other by a temporary hinge that is connected to each other by a hinge pin. A support is installed on the PC concrete box girder on the temporary vent so that the other end of the half-arch steel pipe connected by the hinge is supported.;       After installing the copper bar at the bottom of the half-arch steel pipe,;      The semi-arch steel pipes hypothesized on both sides are lifted by a crane so that the arc joints can be installed by interconnecting the key segments between the two ends.;       An anchor is installed on the PC concrete box girder at the center lower part of the arcuate steel pipe, and the tension is maintained while the arcuate steel pipe is divided into several parts and interconnected with a steel wire centrifugal cable to fix and fix the centrifugal cable to the anchor part. To maintain the arch shape of the arcuate steel pipe,;       After reinforcing the reinforcing bars so as to include the arcuate steel pipe and the wing portion formed on the outer side of the arcuate steel pipe in the upper part of the copper arch of the installed arcuate steel pipe, and install the formwork,;       In the first step, cast the wing which forms the cross section so that concrete extends outward from the hinge part of the arched steel pipe in one step, and then the part adjacent to the wing part, and in the next step, the upper part of the arced steel pipe. Finally, the concrete is divided to form a cast concrete arch.;       The concrete arch and the PC concrete box girder are installed at regular intervals so as to connect the plurality of hanger cables to be connected to each other while installing a tension so that a certain space is formed between the upper part of the temporary vent and the PC concrete box girder. And, while removing the centrifugal cable, the temporary vent is to be removed, it is a method of installing a concrete arch bridge so that the bridge upper slab and the wing portion is integrally connected.