×
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

Ignoring Water?

Ignoring Water?

Ignoring Water?

(OP)
I was having a discussion with the regional engineer for a rather large nationwide firm. He told me that he 'ignores' the affects of water table on the embedded portion of cantilever soldier beams (uses a moist unit weight instead of a submerged unit weight). Does anyone know of a rational for that?

RE: Ignoring Water?

Well, if the soil is submerged follows Terzaghi's notion about bearing capacity of a footing with saturated soil that is ( i forgot the notion i think you divide the bearing capacity by 2)

RE: Ignoring Water?

(OP)
I have always taken a buoyant weight of soil for passive resistance below water table. I was not familiar with Terzaghi's 1/2 notion, but it makes sense to me in a basic way. I have simply never heard of someone flat out knowingly ignoring the effects of groundwater on passive resistance in soils.

RE: Ignoring Water?

If buoyant soil weighs half as much, passive pressure is half also. I don't see how you can ignore buoyant weight. That being said, there is more going on with soldier beam embedment than just passive pressure. Soldier beam embedment design is a rather empirical process. Shorter soldier beam embedments often work but are hard to prove on paper and are even harder to get approved by a submission reviewer when design references are few.

www.PeirceEngineering.com

RE: Ignoring Water?

If the soil is saturated and is flowing toward a given axis , then take the saturated density and insert the PWP in the shear strength equation
by doing so you will acknowledge the buoyancy and the flow force of water .

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

White Paper - Considerations for choosing a 3D printing technology
The adoption of 3D printing into major companies’ product development life cycles is a testament to the technology’s incredible benefits to consumers, designers, engineers and manufacturers. While traditional production methods have limitations in manufacturability, 3D printing provides unparalleled design freedom due to the additive method of building parts layer by layer. Download Now
White Paper - Are all 3D printed metals the same?
With so many different 3D printing metal systems and processes today, how can you know exactly what you’re getting? Today, there are several different methods for manufacturing 3D printed metal components with their own strengths and limits. 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