线路爬行对无缝道岔受力与变形的影响分析  

Influences of Rail Creep on the Longitudinal Forces and Displacements of Welded Turnout

作　　者：王平[1] 郭利康 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《西南交通大学学报》2002年第6期615-619,共5页Journal of Southwest Jiaotong University

摘　　要：无缝道岔辙叉及辙跟结构不同,则纵向力的传递机理不同,致使不同结构的无缝道岔受力与变形规律不同。分析比较了固定辙叉、长翼轨可动心轨、短翼轨可动心轨三种辙叉型式、限位器及间隔铁两种辙跟型式的无缝道岔纵向力传递机理及对无缝道岔各部件受力及变形的影响。分析结果表明:提高线路阻力,控制无缝道岔前后线路的爬行量,有利于提高无缝道岔的铺设轨温范围。Moving wheel loads will cause creep and additional temperature stress in continuously welded rails (CWR). The difference in the structure of frog and frog heel will result in different transmission mechanism of the longitudinal forces in welded turnouts. Therefore, the welded turnouts with different structures have different mechanical properties and deformations. In this paper, a comparative analysis is made of the influences of the transmission mechanisms of longitudinal force of welded turnouts with different structures on the loads and deformations of various components. The analysis results show that raising track resistance and controlling the creeping displacement of the welded turnouts are beneficial to enlargement of the temperature scope for laying welded turnouts.

关 键 词：无缝道岔 受力 变形 影响 无缝线路轨道 位移 内力 线路爬行 附加力 温度力 

分 类 号：U213.6[交通运输工程—道路与铁道工程]