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

Structural Capacity of the Pile

Structural Capacity of the Pile

Structural Capacity of the Pile

Hi guys,

I have to design the pile. I know how to calculate the compression and uplift pile capacity. But i don't know how to calculate the structural capacity for compression, uplift and lateral. Can you please help me and guide how to do the complete pile design. Any link or software recommendation will be very welcome.

RE: Structural Capacity of the Pile

What type of pile is it?

RE: Structural Capacity of the Pile

I'd do Google search "pile foundations" and look for a text book or an on line text. US corps of Engineers, US Navy have on-line engineering texts on this subject. It is probably too complicated for this forum, since it depends on ground conditions and type of job, etc.

RE: Structural Capacity of the Pile

If you mean the structural capacity of the pile, neglecting the geotechnical capacity, then it would be designed just like a column. The trick is determining the appropriate unbraced length to use.

RE: Structural Capacity of the Pile

It is bored pile. Actually I never do the design of the column, can you please suggest me any software which can perform this analysis.

RE: Structural Capacity of the Pile

So, it's cast-in-place reinforced concrete drilled shaft? In that case, once you have the moments and shears from a pile/drilled shaft analysis program (Allpile, L-pile, etc.), there are numerous options for structural analysis programs that will analyze and provide the capacity of a reinforced concrete column, which is what a drilled shaft is for structural design purposes.

However, by way of a warning and disclaimer, the structural design should be done by a qualified structural engineer, even for something as seemingly simple as a drilled shaft design.

RE: Structural Capacity of the Pile

Thanks HotRod10, yes I got the moments and share with the Allpile. I have a design which calculated the reinforcement using the S-Concrete. I am studding it and I will utilize this to design the shaft. No structure engineer is available here and company does not want spend money to some exterior resources. Can you please suggest me any reading material for the beginners.

RE: Structural Capacity of the Pile

Google worked examples of structural design to Eurocodes. Thats a good starting point for design of columns.

A software will give you the answer but if you dont know the inputs or the parameters than are most influential then its meaningless.

I am definitely no expert in structural design but the below is some preliminary design information that may be of use. Its for a secant piled wall but the theory is still applicable. As above you need to design it as a column and use the column design charts.

You say your company doesnt want to spend money on exterior resources but they are happy to let you "waste" time by doing it yourself with limited starting knowledge. I am all for learning on the job but to me it would be much more beneficial if you paid a structural engineer to do the design (by hand and with software). You could spend hours and hours reading material etc and still not do the design correctly.

It would likely be only be a few hours work an experienced geotechnical/structural engineer. You could always pay for some additional time and have them come to the office to work through the calculations.

I would also recommend that you try it by hand and upload the calcs here. Folks are good on this site, while they wont do the work for you or "sign off" on calculations they are more than happy to help and answer questions on specific steps of a calculation etc.

RE: Structural Capacity of the Pile

Thanks Eriechch, you are right but I don't have a choice. I will study this design and try to understand the inputs.

RE: Structural Capacity of the Pile

Khurram Shehzad - the above is preliminary and doesnt cover everything for structural design of piles. For example, the shear links are estimated in a very simplistic way. It is only a very basic starting point.

I have been in a similar position as you where you havent got the skills yourself or in the office and are forced to try your hand at something new. I would never try my hand at something that had a serious conscious if it failed but smaller less critical things are ok. While its ok from time to time, I wouldnt work for a company that operated like that continuously.

You will probably learn a lot form this exercise which is good!

Good luck.

RE: Structural Capacity of the Pile

Thanks, I will just try to understand and will avoid any critical thing by myself. I am studding this example it has minor calculation mistakes, but anyway it is a good example.

RE: Structural Capacity of the Pile

'I am studding this example it has minor calculation mistakes' - a good reason to never trust anything you find on the internet :)

RE: Structural Capacity of the Pile

What is the cross section shape of the pile? is it rectangular or circular? Do you just need to plot the interaction diagram?

RE: Structural Capacity of the Pile

The Cross-section is circular with dia of 100cm. I need to design the 20m long pile reinforcement.

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


Research Report - How Engineers are Using Remote Access
Remote access enables engineers to work from anywhere provided they have an internet connection. We surveyed our audience of engineers, designers and product managers to learn how they use remote access within their organizations. We wanted to know which industries have adopted remote access, which software they are using, and what features matter most. Download Now
eBook - Managing the Context of Product Complexity Using the Digital Twin
Keeping track of changes to complex products is difficult—think Aerospace & Defense equipment, new generations of commercial aircraft, and software-based automobiles. A new way to managing the digital context of the physical product is required and the answer is the Digital Twin. This ebook explores the opportunity available for Operations and Maintenance for the Digital Twin. Download Now
White Paper - Trends in Industrial Filtration
Substantial progress has been made in filtration technologies in recent years. New filter media materials, designs and processes have led to filters that are more efficient, reliable, compact and longer lasting. This white paper will discuss the various trends that are impacting operational responsibilities of MROs today and the resources that are available for staying up-to-date on the latest filtration solutions. 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