Retained Backfill Replacement for Conventional Gravity Walls
Retained Backfill Replacement for Conventional Gravity Walls
(OP)
The overall idea is to increase the height or stability of a conventional gravity wall where there is bad or even 'ok' sandy/clayey site soils behind the wall. Essentially the drainage aggregate or some type of granular material is placed behind the wall and sloped upward at approx a 1:1 to encompass the failure plane. Then the wall is evaluated using the soil properties of the granular material for computing the lateral pressures on the retaining wall (see attached).





RE: Retained Backfill Replacement for Conventional Gravity Walls
Why was a 1:1 plane selected for the failure wedge? It is not clear what the goal is? Do you want to increase the height? How much?
After the new backfill is placed the wall will need to move to engage the friction in the backfill. Is it designed for at rest of active earch pressure? How much movement is acceptable?
Are there other issues: surcharge, scour, hydrostatic pressure? Are you using an friction or passive resistance at the base?
RE: Retained Backfill Replacement for Conventional Gravity Walls
If you are trying to increase the height of an existing retaining wall, replacing the less competent soil behind the wall can certainly help.
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RE: Retained Backfill Replacement for Conventional Gravity Walls
EIT
www.HowToEngineer.com
RE: Retained Backfill Replacement for Conventional Gravity Walls
EIT
www.HowToEngineer.com