Research methods: Based on the current design standard of track and according to the conditions of working environment on the site of track joining，the construction and design principles are worked out } and the rational construction program and the new materials to be used are decided.
Research results: The construction program that the short ties and fastenings are used by interval replaced main track and turnout jointly is adopted
Research Conclusions: The existing jointless track should be spread before joining and the jointless track on the both sides of turnout should be recovered and blocked. The both sides of FFU compound tie should be concave-convex or figured，and the interfacial agent should be painted on contact surface of concretes between new and old roadbeds. The expansion joint should be remained on both sides of roadbed and in the roadbed of turnout. The total area of steel for dispersing stray current should meet the requirement with good electrical connections，especially attention should be paid to banding or welding between reinforces of side strand roadbed and straight roadbed.
2007, Vol. 24 
