Preflexed rigid- frame bridge installed using prestressed upper structure and constructing method thereof

摘要

The present invention relates to a method for constructing a preflex ramen bridge in which a preflex beam forming a superstructure of a ramen bridge and a rigid are connected to each other to apply a load to introduce a prestress into the upper structure of the ramen bridge.;        A diagonal line is formed in each of the preflex composite beams forming the upper structure of the ramen bridge and the horizontal member of the connecting column member connected to the left and right of the preflex composite beam to form a connecting portion in which these diagonal lines are connected to each other. Afterwards, the ramen bridge is pre-assembled on top of the foundation installed to support the ground. At this time, the connecting column member is connected to the outside upward at a predetermined angle to be temporarily assembled. The connection part of the prefabricated beam is provided with a connection concrete, and a constant load is applied to the inner side of the upper structure to the ramen shape of the upper and left sides of the connection column member assembled on the upper part of the foundation so that the connection column member is brought into position. Completely assemble and fix the prefabricated superstructure on top of the part. In this way, the horizontal structure of the preplex composite beam and the connecting pillar member, which is the upper structure, has a size equal to the interval due to the inclination of the diagonal lines formed at the left and right ends of the preflex composite beam and the one end of the horizontal member of the connecting pillar member. Prestress is introduced, and the construction method to install a preflex ramen bridge by paving to form a road surface such as asphalt on the upper structure of the pre-stress is introduced.;        The preflex ramen bridge installed by the above construction method may have a prestress introduced into the upper structure of the bridge to act stronger than the existing bridge to the load acting on the bridge, thereby increasing the length of the bridge compared to the existing bridge. In addition, since the prestress is introduced, the thickness of the beam of the upper structure can be reduced, so that the geometry of the beam can be larger than that of the existing bridge. It has the advantage of preventing the flooding of bridges caused by flooding in the event of flooding due to improved flow capacity of the river compared to the bridge of the same standard.