×
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

Pile Impact Force During Insertion into Pile Sleeve

Pile Impact Force During Insertion into Pile Sleeve

Pile Impact Force During Insertion into Pile Sleeve

(OP)
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!


Resources