If the gaps are welded, how does expansion and contraction due to variations in tempratures are taken care?

Posted by k s karthik (guest) on 2009 May 29 12:02:26 +0000

Informative image. Do you have an image from the other side of the rail? Or even top of the rail? Please email me the images of thermit welding at msm_saifullah@yahoo.com

Posted by M S M Saifullah on 2009 May 29 13:05:30 +0000

@ Karthik: By adding gaps but at large distances!

Posted by M S M Saifullah on 2009 May 29 13:07:06 +0000

by providing SEJ(switch expansion joint) from one stztion to next ,we minimizing the variations due to temp.

Posted by deepak verma (guest) on 2009 May 29 13:50:22 +0000

lot of thermite welding videos are available in you tube, pls check out one among that thru this link http://www.youtube.com/watch?v=nR6K90cR8Lg

Posted by manoj (guest) on 2009 May 29 16:31:57 +0000

@ Karthik..

Railway track is a flexible (floating) structure not like a building which is attached rigidly to the ground. So in a track the stresses developing due to expansion/contraction are absorbed by sleepers (rather a set of sleepers) themselves and transferred to subgrade below. Its because of this feature only that LWRs and CWRs has been made possible..

Posted by Abhishek Gopal (guest) on 2009 May 30 18:05:50 +0000