Thanks everyone. I actually have to design the wall. I looked at the site the other day. Max 8' height all lean clay. The rocks are 30" in diameter. I'm thinking 45 degrees max with a layer of dimple board and a 4" base drain to grade. Maybe two rocks in thickness (60") for the base...
I'm looking for some guidance on evaluating an existing boulder/rock rubble wall. What are the critical components and requirements in terms of height vs. thickness, slope, toe conditions, backfill type, and geofabric/drains?
ATSE thanks for that link it's helpful. I don't know yet what my foundation loads are but they won't be much maybe 20 kip column loads. The depth is 10-feet on average.
I have a site that will have 7-feet of dense gravel fill over 6-feet of soft sands (liquefiable) over native gravel at about 15-feet total. It may be hard to auger through the fill as it has cobbles. I'm considering micropiles, drilled shafts, geopiers, CFA piers, or whatever else would work...
After reviewing the boring logs I forgot about a soft (N=3) 3-foot layer of clay above the sand. My calcs came up with about an inch of total settlement for both layers with a 300psf building load on top the fill.
I have a site that will have 6 ft of fill placed over 6-feet of loose fine-grained sand with N value of 3 with water at the ground surface. I have looked at a schmertmann approach and came up with less than 1 inch of settlement but I'm not buying it. Any thoughts out there?
