INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Ballast on bedrock

Ballast on bedrock

(OP)
Since rail is constructed with limited grades, I know I'm not the first to deal with this. When the rail goes from compacted fill to cut into bedrock (layered limestone and shale), I feel it will behave similar to a loading/unloading facility where the rail comes onto a fixed rigid structure. Should I maintain the ballast thickness constant along the length? Or would it be acceptable to use a thinner amount of ballast along the cuts in the bedrock?

RE: Ballast on bedrock

TigerGuy:
Check the AREMA Stds. (American Railway Engineering and Maintenance-of-Way Association) Stds., and see what they have to say. Check with your local RR, their maintenance-of-way dept., and ask them what they would do. They’ll have some std. details. I’ll bet that when you put ballast on a hard surface, you have to confine it on the sides, maybe cut a trench in the bedrock for the ballast. Otherwise, usage will just rattle the ballast out from under the track and ties, in fairly short order. They do put track and ties, or just track directly on concrete grade beams.

RE: Ballast on bedrock

(OP)
I didn't see anything in AREMA (not that I read the thousands of pages completely wink ). I'll try and contact the local RR officials.

Thanks

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close