铁道标准设计Issue(2)：13-16,17,5.DOI:10.13238/j.issn.1004-2954.2015.02.004
长大坡道铺设无缝道岔可行性分析
Feasibility Analysis of Seamless Turnout on Long Steep Grade
张梦楠 1颜乐 1王平 1王健1
作者信息
- 1. 西南交通大学高速铁路线路工程教育部重点实验室，成都 610031
- 折叠
摘要
Abstract
Based on the finite element method, this paper establishes a nonlinear resistance calculation model of the seamless turnout and analyzes rail longitudinal force and displacement under different working conditions. The results show that slope is negative to stress and deformation of seamless turnout. With the increase of the distance from the resistance reduced section to the turnout, the rail longitudinal force and the maximum displacement increase, and relative displacement between the point rail and the stock rail decreases. The decrease of track bed longitudinal resistance caused by insufficient tamping of track bed may significantly increase stress and deformation of each part of the turnout. Recommendation:(1) in a long steep grade area, the full-length quenched rail or high strength rail should be adopted;(2) observation pile should be arranged to look for turnout creeping where frequent braking is applied in front of the approach turnout, at the point of the seamless turnout, the frog heel and frog center; ( 3 ) anti-creeping of seamless turnout should be strengthened; ( 4 ) the thickness of the track bed in uphill direction should be increased and tamping reinforced.关键词
长大坡道/无缝道岔/有限单元法/非线性阻力Key words
Long steep grade/Seamless turnout/Finite element method/Nonlinear resistance分类
交通工程引用本文复制引用
张梦楠,颜乐,王平,王健..长大坡道铺设无缝道岔可行性分析[J].铁道标准设计,2015,(2):13-16,17,5.
