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


Questions about screw piles

Questions about screw piles

Questions about screw piles

Two questions about helical piles:

1. How accepted is the Torque Correlation method for designing helical piles?
2. For frost heave, is getting below the frost line enough for a screw pile or should you also check the uplift force due to adfreezing. One geotech report I saw recommended using 100 kPa over the surface area of the pipe in the frost depth to get the uplift force.

RE: Questions about screw piles

1. My experience (in Japan) is that helical pile contractors have their own data which correlates pile capacity vs. torque. This is based on static load tests. So, perhaps you can ask your local helical piles contractors if this type of data is available. Bottom line, without field load tests, torque data is typically accepted I my experience.
2. I would think that uplift forces will came from forces acting at the bottom of the pile cap. But better to check with your geotech.

RE: Questions about screw piles

It varies somewhat with locale, but, there is a very good correlation of torque and load capacity... I'll see if I can dig up some literature on this... have a couple of papers stashed away.


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!


Research Report: State of IoT Adoption in Product Development 2019
This research report, based on a survey of 234 product development professionals, examines the current state of Internet of Things (IoT) adoption by product design teams, its perceived importance, and what features and capabilities teams consider important when making decision about adding IoT functionality to their products. Download Now
Research Report: Augmented Reality for Maintenance, Repair and Overhaul (MRO)
The term Industry 4.0 denotes a cluster of technologies that’s poised to fundamentally reshape manufacturing and bring about a new industrial revolution. These include 3D printing (AM), the Industrial Internet of Things (IIoT), artificial intelligence (AI) and mixed reality technologies, more commonly known as virtual reality (VR) and augmented reality (AR). 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