梯形轨道-普通整体道床过渡段布置方式研究  

Study on Setting-up of Transition Section between Ladder Track and Monolithic roadbed

作　　者：江万红[1] 任娟娟[2] 解鹏[2] 刘欢[2] 欧阳明 

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]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 [3]广州铁路(集团)公司广州大型养路机械运用检修段,广州511487

出　　处：《铁道标准设计》2015年第5期74-77,共4页Railway Standard Design

摘　　要：梯形轨道与普通整体道床的过渡部分,由于两种轨道结构形式的轨下基础刚度存在差异,从而影响行车平稳性和钢轨使用寿命。采用线性增加梯形轨道纵向轨枕下减振胶垫个数,作为梯形轨道-普通整体道床过渡段设置方式,建立车辆与过渡段轨道耦合动力学模型,分析不同过渡段设置方式钢轨垂向位移和车体垂向加速度的变化。计算表明,在两种轨道形式连接处梯形轨道的纵向轨枕下,采9个减振胶垫,以等间距0.625 m布置的过渡段设置方式较为合理。Owing to the stiffness differences of foundations under ladder track and monolithic roadbed, the train running smoothness and service life of rail are deeply affected. The paper establishes the coupling dynamics model of“vehicle-rail”, sets up the transition section by linear increase of the number of the damping rubber pad under the ladder track, and investigates the change pattern of the vertical displacement of rail and acceleration of vehicle in different settings of transition section. The result shows that it is more reasonable to install nine damping rubber pads with equal spacing of 0. 625 m under longitudinal sleepers of ladder track at the joint of the two track structures.

关 键 词：梯形轨道 过渡段 轨道刚度 动力计算 

分 类 号：U213.241[交通运输工程—道路与铁道工程]