张兴

摘要：我国电气化铁路的发展已有40多年的历史了。近年来，随着国民经济的快速发展和铁路运输需求的日益增长，铁路现有的运输能力已经很难满足当前运输的需要。为此，电气化铁路线上的列车只有不断提高运行速度来满足运输量加大的需求，而既有的接触网已经难以满足提速的要求，这就需要在既有线路的基础上进行接触网的改造施工，本文介绍了铁路电气化接触网改造工程的特点、区间线路换边拨接处接触网施工方法、如何做好铁路电气化接触网工程改造施工的措施及施工中的难点问题。

关键字：铁路电气化；接触网改造；区间线路换拨

Abstract: the development of electrified railway in China for more than forty years of history. In recent years, with the rapid development of national economy and railway transport demand, increasing railway existing transport capacity has been difficult to meet the needs of the current transportation. Therefore, electrification railway line on the train only by constantly improve the operation speed to meet the needs of the volume increase, and the existing contact has been difficult to satisfy the requirement of speed, it needs to be in both line on the basis of the transformation of contact construction, this paper introduces the railway electrification contact of the reconstruction project characteristics, interval line in side thus place contact construction method, how to make railway electrification contact engineering modification construction measures and construction of the difficulties.

Key words: railway electrification; Contact modification; Interval line in dial the

中图分类号：TU74文献标识码：A 文章编号：2095-2104（2012）

一、铁路电气化接触网工程改造特点

我国铁路运输的牵引动力，目前主要有蒸汽牵引、内燃牵引和电力牵引三种形式。以电力牵引作为主要牵引方式的干线铁路称为电气化铁路。接触网是架设在铁路线路上空，向电力机车供给电能的特殊形式的输电线路。既有电气化铁路增建二线接触网工程，主要是配合线路工程对既有网进行改造，并新建二线接触网，其特点如下：

1、多专业同时施工，交叉干扰严重

既有电气化铁路已经运营多年，行车密度大，改造施工过程中，行车对施工的干扰相当严重。另一方面，受施工工期制约，施工天窗影响，往往站前站后工程同步进行，共同占用停电天窗时间。天窗点接触网工程施工作业既要与相关单位交叉施工，同时本专业各工序之间也要交叉进行。……