METHOD FOR INCREASING LENGTH OF CONTINUOUS WELDED RAILS Russian patent published in 1998 - IPC

FIELD: railway transport; permanent way; laying rail lengths to block-section. SUBSTANCE: method of increasing the length of rails of continuous welded rails comes to unloading the lengths to be welded from vehicle, aligning the lengths and butts to be welded, welding of rail lengths first to previously laid length and then to each other and machining of welded joints. Prior to welding each rail length, only end part of length is unloaded from vehicle to base, leaving the rest of length on vehicle. In process of welding vehicle with unloading part of length is moved in direction of joint under welding. After welding and machining of welded butt joint the remaining part of length is lowered to base. EFFECT: reduced labour input, cut down interruptions of traffic.