STUDY ON CAST-IN-PLACE CONCRETE BEAM SLAB AND STEEL LATTICE COLUMN COMPOSITE RAILWAY TEMPORARY BRIDGE STRUCTURE

According to engineering demands, a composite railway temporary bridge and its application in railway hub projects are presented. The force-resistant system in the bridge is composed of two parts: the cast-in-place reinforced concrete beams and slabs, and the steel lattice columns. The dynamic and vehicle-bridge coupling vibration characteristics of the bridge are analyzed, based on which design strategies are adopted in the project to strengthen the lateral stiffness. In railway hub projects, the composite temporary bridge effectively resolves the contradictions between railway station construction and the safety operation of existing railway lines, and could be an ideal complement of the traditional temporary bridge.