Abstract：Research purposes: In cause of innovation of existing railway line, sometimes it needs to lay continuously welded rail in minor section, but it is difficult to do it with. Long-railed machinery, so the method of replacing and laying track with track panel was adopted previously. However, the method needs to be improved urgently because it can cause serious interference on the traffic of the existing railway line, such as causing train delay and creating many unsafe elements.
Research methods: The track materials can be delivered inside and outside working site under condition of no lining and moving track and the number of blocking line can be reduced by adopting the method of one-time manually laying trans-section continuously welded rail instead of the method of replacing and laying track with track panel.
Research results: The contradiction has been solved between laying track in cause of innovation of existing line and traffic of existing line.
Research conclusions: The method of manually laying continuously welded rail, conducted in short operational interval is an effective way for guaranteeing the traffic safety and construction safety in electrification innovation of existing line.
2006, Vol. 23 
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