×
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

Lateral Earth pressure of unyielding wall with slope backfill

Lateral Earth pressure of unyielding wall with slope backfill

Lateral Earth pressure of unyielding wall with slope backfill

(OP)
Earth pressure coefficient of unyielding wall with flat backfill is simply assumed as 1-sin(fi), but I don't know what I should use if the backfill is slope?

RE: Lateral Earth pressure of unyielding wall with slope backfill

1.5 times the appropriate active earth pressure.

f-d

¡papá gordo ain’t no madre flaca!

RE: Lateral Earth pressure of unyielding wall with slope backfill

(OP)
Thanks, Fattdad! Do you have any reference for the value?

RE: Lateral Earth pressure of unyielding wall with slope backfill

I have seen ko=(1-sin phi)(1+sin beta) and the reference given as the Danish Code.

RE: Lateral Earth pressure of unyielding wall with slope backfill

If you take Ko=1-sin(phi) and Ka=tan^2(45-phi/2), you get the ratio Ko/Ka ranging from 1.35, to 1.5 to 1.65 for friction angles of 20, 30 and 40 degrees.  I just use 1.5.

I used this approach in graduate school and it was well received by Prof. Duncan for an assignment involving at rest earth pressure on a sloping backfill.  I have no other reference, except that's what I've done for the last 20 years.  No broken walls yet!

f-d

¡papá gordo ain’t no madre flaca!

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