Abstract:The frame pier designed for the Nanchang to Huangshan via Jingdezhen railway project is up to 43m tall, which is currently the highest railway frame pier structure in China. This paper firstly analyzes the force characteristics of the railway frame piers, and compares the double-layer frame pier scheme with the original scheme based on specific work points, and finally analyzes the feasibility of the double-layer structure scheme through the finite element model. The research results show that: (1) The railway frame pier is mainly to bear vertical loads, and its structure can be simulated with the input foundation stiffness rigid frame model; (2) For this site, the double-layer frame pier is more expensive than the original one. It saves 7%, and is safer and more beautiful; (3) This construction site adopts the method of grading to increase the pier width to ensure the longitudinal rigidity of the structure, and proposes two standards for the rigidity limit of the double-layer frame pier; (4) According to the structural dimensions and prestress plan proposed by the plan, the inspection results of the cover beam and columns under the operating conditions and construction conditions all meet the requirements of the specification.
