×
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!
  • Students Click Here

*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.

Students Click Here

Jobs

How to design a concrete collar between existing and new concrete pipe

How to design a concrete collar between existing and new concrete pipe

How to design a concrete collar between existing and new concrete pipe

(OP)
I'm trying to find information on how to design a concrete collar.  This collar will be used to connect an existing concrete box culvert with approximate dimensions of 5'x5' to a new concrete pipe which will have an inside diameter of 48" and outside diameter of 4"-10".  My design now calls for a 10" thick concrete collar which is 48" inches long...24" on each side of both the pipes. The collar has #5 bars spaced 12" O.C. in both directions.  Also, I'm calling for #4 dowels epoxy grouted in four locations in both the existing pipe and also the new pipe.  Does this design sound reasonable?   

RE: How to design a concrete collar between existing and new concrete pipe

are you transferring moment?

RE: How to design a concrete collar between existing and new concrete pipe

(OP)
NO

RE: How to design a concrete collar between existing and new concrete pipe

Maybe I'm missing something (besides my marbles) but if your culvert is 60" x 60" and your pipe has an OD of 58" why not brick it up? That's the usual method done for manholes and catch basins.

RE: How to design a concrete collar between existing and new concrete pipe

What a strange question.  You are asking if your design (for want of a better term) is reasonable.  I tend to agree with olsont.  The safe answer is NO!

 

BA

RE: How to design a concrete collar between existing and new concrete pipe

Better check your hydraulics. The pipe has half the area of the box, plus you'll lose even more capacity due to turbulence at the transition. Extend the box culvert with more 5x5 box.

RE: How to design a concrete collar between existing and new concrete pipe

@ BA, I think he ment NO! to transfering moment.

Perhaps if the poster could attach a sketch?
 

RE: How to design a concrete collar between existing and new concrete pipe

Build a ten foot long manhole around the pipe and box. Shape the inside to steer/contaian the flow, which ever way it goes. If from bow to pipe, add a big overflow storage area.

Richard A. Cornelius, P.E.
WWW.amlinereast.com

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