RHAMEN BRIDGE HAVING PRESTRESSED STEEL-REINFORCED CONCRETE COMPOSITE GIRDER AND CONSTRUCTION METHOD THERE OF

摘要

A Rhamen bridge having pre-stressed steel reinforced concrete composite and a method of constructing the Rhamen bridge are provided to build longer spans and to obtain sufficient overhead clearance for facilitating passage of vehicles by first producing composite steel girders by pouring and curing concrete on lower flanges of segmented steel girders and then installing tendons on the entire span of the mutually linked segmented composite steel girders to exert tensile force on the structure. A Rhamen bridge having pre-stressed steel reinforced concrete composite includes plural walls(5) constructed on the ground, a support steel girder installed on upper parts of the walls, PSC(Pre-stressed Composite) composite steels installed on an upper part of the support steel girder, floor concrete(4) poured on the PSC composite steel, and wall concrete poured on the extra support steel girders and walls. The PSC composite steels include plural composite steels made by pouring and curing the concrete on lower flanges of steel girders segmented to match the sizes of spans and cambers. The segmented composite steel girders are mutually linked, and tendons are installed to apply pre-stressing on the entire span of lower flange concrete and lower flanges of the steel girders. A method of constructing the Rhamen bridge having pre-stressed steel reinforced concrete composite comprises the steps of: producing segmented steel girders in sizes matching the spans and cambers; producing composite steel girders by pouring and curing the concrete on the lower flanges of each segmented steel girders; linking the composite segmented girders by welding or by using high strength bolts; connecting sheath pipes and grouting the linking grooves between the composite steel girders; inserting tendons on the entire span and pre-stressing the composite steel girders; grouting the sheath pipes; installing support steel girders on the walls constructed on the ground; installing the composite steel girders having tensile force applied on the support steel girders; pouring the floor concrete and residual wall concrete; and constructing fender walls and paving the structures.