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Effect of Backslope on Retaining Wall

Effect of Backslope on Retaining Wall

RE: Effect of Backslope on Retaining Wall

You may profit from the statement of Coulomb's active Push, that have provision for the slope, and uses your stated H.

RE: Effect of Backslope on Retaining Wall

While I don't remember exactly how to do it - most examples (and software) for this calculation show how to handle this situation. Kind of like a surcharge load if I remember.

Find a good book or Google retaining wall calculations.  

RE: Effect of Backslope on Retaining Wall

The surcharging method only works if it is a short slope above the wall, if the slope continues on for multiple times the retained height then you need to calculate it properly as per the previous post.

You will also need to check the overall stability of the slope.

RE: Effect of Backslope on Retaining Wall

I don't think that much slope will have much surcharge effect, since your H1 will not be significant until its several feet away from the wall. Why not just conservatively design for 1-2' of surcharge and call it a day?

RE: Effect of Backslope on Retaining Wall

As Willis suggested, just calculate the Ka and Kp values for the appropriate angle of soil.

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

RE: Effect of Backslope on Retaining Wall

oohh cross post well here's my response again:

If it is an MSE wall and your using NCMA design then the Ka value will be calculated using Coulomb equation which will reflect the backslope condition and therefore your height is H (the total height of the wall at back of wall).

Also see NCMA's Design manual for segmental retaining walls.   

EIT

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