新建高速铁路有砟轨道线路平顺性控制技术

基于高速铁路有砟轨道设备的记忆性及维修天窗资源的有限性,在施工建设阶段开展高速铁路有砟轨道平顺性控制,提高线路开通运营品质具有重要的意义。通过对比分析两条有砟轨道开通后平顺性自然衰减规律,发现有砟道床稳定性是线路开通后维持轨道平顺性的核心要素,而捣固作业后的稳定作业是提高道床密实度和稳定性的主要手段。为此以杭黄铁路有砟轨道建设为载体,提出"先轨距调整、后大机整道、再扣件调整"的精调流程,"少捣多稳、低速重稳"的大机作业模式。实践证明,采用上述做法,杭黄铁路拉通试验中正线轨道几何尺寸均值指标TQI为2.5 mm,峰值指标偏差扣分为0,成效显著。

可编程控制器在养路机械中的应用

将可编程控制器应用于CD 1 6型道岔捣固机中 ,实现线路捣固作业的半自动化 ,具有良好的效果 ,为实现线路维修作业自动化迈进了一步。

大型养路机械的科学化检修及管理

铁路行业处于高速发展状态,养护手段也随之增多,并且已经发展至大型机械化养护。当前,铁路能否安全运行,受大型机械化养护工作影响。论述大型养路机械类别、作用,分别探讨大型养路机械科学化检修、管理方法,保证铁路工程常态运转。

大准铁路轨道机械化维护集中修作业效率分析

集中修,即集中在一段时间内对铁路线路进行养护维修。本文选取大准铁路2011年及2012年春季集中修,应用大型养路机械进行轨道机械化维护的作业数据为样本,应用统计分析基本原理。通过SPSS统计分析软件,分析线路捣固、线路清筛两项主要作业的天窗作业效率及计划兑现率,进行数据挖掘,对大准铁路进行机械化维护集中修作业效率进行分析。

The Use of Tamping Machine for Diagnosising the Longitudinal Forces in Rails of CWR Track

In the novel approach to the diagnostic tests of continuous welded rail （CWR） track by the use of the tamping machine, the fundamental statement related to the recording of the curvature with a definite value of the lateral displacement being subjected to verification, can provide a basis for the determination of the longitudinal axial force in the rail. An attempt has also been made to define an alternative factor which by means of the measured signals, could be used for the determination of the axial forces in the rail sections. A power engineering approach has been adopted to this concept. Within the framework of the experimental investigations, measurements were carried out in the track test section. The investigations were based on stretching the rail sections by stretchers and on lateral displacements of the track by the tamping machine. The operation of the measuring apparatus was also tested in the experimental railway track section while carrying out the geometrical adjustments by the tamping machine. As a result of next series of the investigation carried out in 2006-2007, the authors worked out a procedure of estimating the longitudinal forces in rails of CWR track.