Continuous multi-span bridge using bridge girder units and construction method thereof

摘要

The present invention takes a large amount of material unnecessarily hameuroseo build a bridge by making a bridge girder on the basis of the maximum bending moment size calculated excessive when making girder for bridge construction is also to be applied to construction cost is excessive due to the labor costs to reduce as much surplus moment size due to the maximum bending moment magnitude and the difference between simple beam was applied to the previous maximum bending moment magnitude occurred when sequencing a bridge to be built in the future when making unit bridge girders to eliminate the wasteful factors the span can be built using the unit as a bridge girder structure with sequencing production relates to the construction method of bridge. ; Installing the steel over a predetermined length on the upper flange of the side end portions, but the bottom flange of installing a length of steel to be a predetermined length extending from the respective side end portions and central portion, and installing a steel frame over a predetermined length, abdomen abdomen at regular intervals between the abdominal sujikjae installing a sujikjae is a temporary fixing block to the inside of the side end portions and provided on both sides of the abdomen sujikjae a pair of temporary fixing block with a predetermined spacing above the lower flange of the central part forms a drilling on the lower flange the bottom flange after installing a one on either side of the abdomen sujikjae installing permanent fixing block to right sides of the upper flange of the lower abdomen sujikjae top of that position, and install a steel material of a predetermined number in the lower flange, and pouring concrete curing after settling in fixed tension to the tensile force acts on the installed steel bars and are installed in a temporary settlement block and bridge girder production unit, ; While assembling steel and connection of the unit bridge girder predetermined length extending presented adjacent to the installed steel frame installed on one end of the unit of the bridge girder after the unit of bridge girders which a mounted on the pier, or alternately forming the connection, the unit of the bridge girders after the was off certain inward distance from the one end to enter into a temporary fixing block and the temporary fixing block installed to an end of the other side is installed on the lower flange to the steel bar fixed, permanent fixing block and adjacent to installed the other is installed on one end of the upper flange introducing a tensile force after the permanent connected to each other by the fixing block of the end bars, and pouring concrete for connection curing and relates to a construction method of a multi-span bridge sequencing installed by removing the temporary fixing steel rods connected to the block. ; When you build a unit the span sequencing bridge using a bridge girder of the present invention, through the installation step-by-step how to construction the separation of the frontal garment size and cross-sectional configurations, such as to reduce the weight for later hypotheses upon the completion, generating girders and reducing unnecessary moments in size and because of this, and to avoid excessive use of hyeonggo and material of the girder to achieve an economical bridge construction, respectively installing the steel frame on the top and bottom flanges of the end and mid-effective synergy of the composite member and to reap a, since the arrangement of the rod which is installed a linear shape can be eliminated the tensile force decrease due to friction of the interference and the sheath of the reinforcement than that of the conventional parabolic arrangement has a construction such as a simple and easy to be effective .