Abstract:In view of the harsh requirements of modern railway bridges for high strength and high durability of the bridge deck slab, and to solve the problems of steel bridge deck slab being easily affected by load and environment, resulting in rust and fatigue cracks, and thus shortening the service life and increasing maintenance costs, the high-efficiency manufacturing technology of stainless steel composite bridge deck slab is explored with the Jiyang Highway and Railway Two-use Extra-large Bridge as the carrier. Based on the “heterogeneous material synergy” characteristics of composite steel plates, the precise control is realized through multi-link process innovation， which are that the cutting and chamfering process in the blanking stage is optimized to control the error, the U-rib processing is organized to build a new production line to ensure the section accuracy and close fit, the assembly link adopts automatic equipment and robot welding system to improve weld quality, and through the optimization of welding process, the problems of performance deterioration and welding deformation in the heat affected zone are solved. The results show that process innovation has greatly improved the production efficiency of steel bridge deck slab, and has formed a replicable and popularized CNC and automation process system, which verifies the adaptability of stainless steel composite plates as alternative material for bridge deck slab, and provides key technical support for the application of this material in similar railway bridge projects.
