Research purposes:Due to the uneven distribution of track stiffness and mass in turnout area and its inherent irregularities,the structural stress is more complicated than that of the main line.Turnout has always been a high incidence area of disease and the difficulty of maintenance.Therefore,it is more risky and difficult to cross the railway throat switch area under the top bridge than the main railway line.In this paper,a new reinforcement system with good mechanical properties and wide application scope is put forward,which is applied to the railway throat switch area under the top bridge.Research conclusions:(1)The calculation of beam based on simply supported beam structure is inconsistent with the stress state of the actual beam.In the numerical simulation analysis of vertical and horizontal beam reinforcement system,the longitudinal beam,rail,rail beam and switch tie should be included,which is consistent with the stress state of the beam in the actual project.(2)The change of the modulus of the subgrade has little influence on the displacement of the beam and rail.In order to prevent the collapse of the top bridge area and the subgrade on both sides during construction,it is suggested to take appropriate grouting measures.(3)This research has a reference for the design of the reinforcement system of the railway throat switch area under the top bridge.
关键词
桥梁工程/框架桥/纵横梁加固体系/道岔区/有限元/变形
Key words
bridge engineering/frame bridge/vertical and horizontal beam reinforcement system/switch area/finite element/deformation
维普
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