Retaining Wall Design
Retaining Wall Design
(OP)
Hi All,
I have to design a retaining wall which has a large part of the stem below ground. The reason being we found somewhat questionable and suggested excavating down to more suitable depth for bearing purposes.
The height of the stem is 25 feet. however the soil over the toe is approximately 10 feet but tapers at a 4H:1V slope a distance of about 30 feet from the face of the retaining wall and then slopes at 2H:1V.
I'd like to use some of the material in front of the wall to resist not only overturning but to reduce the bending in the stem. I was thinking of ignoring the first 5 feet since the material to the front of the wall slopes and using a reducing the passive resistance to 50% as an additional factor of safety since I'm aware it takes more movement to develop the full passive resistance. Does this seem reasonable?
Thanks
I have to design a retaining wall which has a large part of the stem below ground. The reason being we found somewhat questionable and suggested excavating down to more suitable depth for bearing purposes.
The height of the stem is 25 feet. however the soil over the toe is approximately 10 feet but tapers at a 4H:1V slope a distance of about 30 feet from the face of the retaining wall and then slopes at 2H:1V.
I'd like to use some of the material in front of the wall to resist not only overturning but to reduce the bending in the stem. I was thinking of ignoring the first 5 feet since the material to the front of the wall slopes and using a reducing the passive resistance to 50% as an additional factor of safety since I'm aware it takes more movement to develop the full passive resistance. Does this seem reasonable?
Thanks





RE: Retaining Wall Design
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RE: Retaining Wall Design
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RE: Retaining Wall Design
I have toyed with the idea of requiring the construction contractor to stain the concrete below your minimum toe backfill line with a note to not remove backfill, but a drainage matt and/or the ravages of time will throw that out the window.
In my jurisdiction they are brining in 'Retaining Wall Agreements' which are signed between the owner of the wall and any adjacent property, and a copy is permanently attached to the city files for those properties. Perhaps including the required toe backfill depth in any kind of design/ agreement can help.