×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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.

Students Click Here

Box Culvert to Steel Pipe (Drainage Structure along road)

Box Culvert to Steel Pipe (Drainage Structure along road)

Box Culvert to Steel Pipe (Drainage Structure along road)

(OP)
Good day everyone!

I'm currently reviewing a plan that involves the above-mentioned subject. It's a drainage/interceptor connected to a creek upstream and a detention pond downstream. The structure involved originally was a 400m (sta. 0+000 to Sta. 0+400) double barrel box culvert below the alignment of a road with man hole structures every 20m. Due to construction problems, the design was proposed for revision wherein along sta. 0+200 to sta. 0+260, the box culvert will be replaced with a circular steel pipe.

Is there a manual or guidelines in determining equivalent size or diameter of pipes using the design discharge calculated from the previous design? What other critical analysis are required for such changes? Thank you in advance.

RE: Box Culvert to Steel Pipe (Drainage Structure along road)

you will need to run the hydraulics to size the pipe and junction structures. even if you select "equivalent size pipes", there will be significant headloss at each transition structure.

Los Angeles County has a good manual for this analysis:
https://dpw.lacounty.gov/wrd/publication/engineeri...

RE: Box Culvert to Steel Pipe (Drainage Structure along road)

How are you connecting the concrete box culvert to the steel pipe? Also, why is it necessary to have a manhole every 20m? On a cursory glance that seems excessive without any additional info.

To answer the question about equivalency, I would use Manning's to see how the steel pipe will convey the desired flow at the designed slope. What are the sizes of the double box and steel pipes?

RE: Box Culvert to Steel Pipe (Drainage Structure along road)

(OP)
It will serve as an interceptor conveying water from a creek upstream to a detention pond downstream with flood gates at both sides.

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! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

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