Special aspects of long welded rails as related to track structure, rail welding, control of rail temperature, and maintenance of long welded rails primarily to prevent buckling are outlined; maximum length of long welded rail adopted on Japanese National Railways is 1500 m and at both ends, expansion joints are attached; long welded rails are not used in curves whose radius is shorter than 1000 m; in construction of New Tokaido Line, maximum rail temperature was assumed as 60 C, minimum rail temperature as -10 C and normal rail temperature at which rails are fastened to sleepers in free state as 20 to 30 C; releasing and refastening of rails to control fastening temperature.
Long welded rail in New Tokaido line
Permanent Way
Permanent Way ; 10 , n 2
1968
26 pages
Aufsatz (Zeitschrift)
Englisch
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