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At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

(OP)
I am trying to find some resources that discuss how to calculatate the at-rest lateral earth pressure coeffient when you have a sloped backfill. I have searched past threads and have only seen people's opinions without any resources (I would like to be able to point to something published in my calcs)

If it helps what I am trying to find is the pressure on the side of a pre-engineered building wall due to the building being loaded with corn.

Thanks

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

I am not sure if you have a farm code in the US (assuming that is where you are), but the Canadian farm code provides recommended pressures for grain goods such as corn.

Brad

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

I have seen such numbers - think from an AG University but seem to have a range based on corn type, moisture, etc.

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

(OP)
I really have all the information I need for the product to use in Rankin or Coulumbs forumlas (corn unit weight, friction angle, etc.) The problem I have is not being able to find anywhere where the problem of at-rest situation has sloping backfill.

Thanks,

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

I use Ko = (1-sin (phi))(1 + sin(slope). So for phi = 30 Deg. and 2:1 backfill slope, I get 0.5 (1.448) = 0.724

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

(OP)
FixedEarth I had heard of this approach and it seems like it gives reasonable results. Do you know how this was derived or of a text that references this?

Thanks!

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

Don't have a text or a reference. Could be derived from triginometric identities. I will let you know but don't hold your breath.

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

I have a manual which gives active components for retaining walls with sloped backfill and broken slope backfill. The reference quoted is Foundations and Earth Structures, NAVFAC DM-7.2. It may be a good source to look into for at rest conditions. Try if it's available online.

RE: At Rest Lateral Earth Pressure Coefficient w/ Sloped Backfill

Section 6.4 has of this article gives referance for the method FixedEarth has suggested:
http://www.cedd.gov.hk/eng/publications/geo/doc/eg1_chapter6.pdf

EIT
www.HowToEngineer.com

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