hand vane/ effective angle of internal friction
hand vane/ effective angle of internal friction
(OP)
Hi Guys and girls
Does anyone know if there is a loose correlation for a sand and gravel(structural backfill)by using a hand vane to get a indication of the shearbox angle???, i have to wait two weeks for the result of the shearbox but time is of the essence. or any other ideas????
thanks guys
Does anyone know if there is a loose correlation for a sand and gravel(structural backfill)by using a hand vane to get a indication of the shearbox angle???, i have to wait two weeks for the result of the shearbox but time is of the essence. or any other ideas????
thanks guys





RE: hand vane/ effective angle of internal friction
RE: hand vane/ effective angle of internal friction
is there nothing that could give an indication say to the nearest 5 degrees???
RE: hand vane/ effective angle of internal friction
RE: hand vane/ effective angle of internal friction
You could drive a split spoon sampler or other type of penetrating tester to get an idea.
RE: hand vane/ effective angle of internal friction
That said, make sure the drained friction angle is really what you need for the type of loading involved. It probably is for that material, unless it is loose and saturated.
Also, if (as I think I read between the lines) you are interested in pressure on a basement wall or something, remember that the pressure near the top of the fill is going to be larger than what you get from the oft-cited Ko = [1-sin (phi')] or 0.9*[1-sin (phi')] because of the effect of compaction and "locked-in" horizontal stress.
RE: hand vane/ effective angle of internal friction