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

Pile Impact Force During Insertion into Pile Sleeve

Pile Impact Force During Insertion into Pile Sleeve

Pile Impact Force During Insertion into Pile Sleeve

We are considering the design of a subsea structure that will use pin piles for permanent foundations.

During the pile installation into the guide cone, assume the pile impacts onto the 'cone' plate of the guide.  A vertical and lateral impact force will result.

How is the initial impact force on the guide determined?

We have considered using energy equations, with the known mass of the pile, impact velocity (as a combination of the crane lowering velocity and the wave motions effects).

However, to determine the impact force we would need to know the impulse time.  I am not aware of any direction from a design code to determine this.

Does anyone have any suggestions?

RE: Pile Impact Force During Insertion into Pile Sleeve

bouyant weight of pile x 2 in any direction you want.

From "BigInch's Extremely simple theory of everything."

RE: Pile Impact Force During Insertion into Pile Sleeve

twice the pile weight laterally could result in a very large force for the bigger piles.

Another rule of thumb is 10% of the dry weight of the pil, bother vertically and laterally.

RE: Pile Impact Force During Insertion into Pile Sleeve

maybe at 250 m depth.  At 50 meter depth, 10% might be pretty low.

What would you be doing, if you knew that you could not fail?

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


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