×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• 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.

# LPILE Group Effects

## LPILE Group Effects

(OP)
I am trying to run LPILE for some cored piers that are 3 diameters apart. Per the soils report they must be a minimum of 5 diameters apart in one direction (normal to the load) and 8 diameters apart (parallel to the load) or else I need to use a reduction factor which they gave me. How do you incorporate that into LPILE?
Replies continue below

### RE: LPILE Group Effects

LPILE is only for single piles..

### RE: LPILE Group Effects

(OP)
What about the p-multipliers for group effects?

### RE: LPILE Group Effects

I concur with CAD. P-Y Multipliers can be used to account for closely-spaced piles.

### RE: LPILE Group Effects

(OP)
Do you know how to do that? I am only given one value for the p-multiplier in my soils report (0.75) but I see in the manual that you must put it based on distance from pile head.

### RE: LPILE Group Effects

The distance is the depth, i.e. the distance below the top of the pile.

You may want to discuss this someone more familar with this type of analysis if it is important to the project since your experience with the software appears limited.

Mike Lambert

### RE: LPILE Group Effects

Go to Modifications Factors for P-Y Curves and fill out two rows for Depth Points. I don't know how your pile cap set up, pile length, and soil layers but one example would be:

Depth Point, Distance from Pile Head, P-Multiplier, Y-Multiplier
1, 0, 0.75, 1
2, 50, 0.75, 1

#### 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.

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:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!