stacked stone retaining wall
stacked stone retaining wall
(OP)
Anybody have a value for the coefficient of friction for field stone on field stone (no grout)?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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stacked stone retaining wall
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RE: stacked stone retaining wall
RE: stacked stone retaining wall
RE: stacked stone retaining wall
RE: stacked stone retaining wall
hard steel on hard steel 0.78
Aluminum on Aluminum 1.05
Teflon on Teflon 0.04
magnesium on magnesium 0.6
oak on oak parrall to grain 0.62
oak on oak perpendicular to grain 0.54
cast iron on cast iron 1.10
RE: stacked stone retaining wall
The coefficient of friction is an empirical rule that is associated with the force required to move one object rubbing against another relative to the force with which the two objects are being pressed together. The rule
is that the required force for motion is linearly proportional to the normal force, and the ratio between the two is the coefficient of friction (always between 0 and 1).
There are different coefficients for different types of motion - there is a coefficient to get the motion started, and another to keep it going, and yet another associated
with "rolling" as opposed to sliding.
Friction comes from the electrical interactions between the two surfaces at the level of the atoms and molecules, and can often be significantly reduced by interposing a liquid (a lubricant) between the two surfaces, because then the upper surface slides on a layer of lubricant which can move freely over the other layer of lubricant
attached to the lower surface.
Quotation by Arthur Smith
RE: stacked stone retaining wall
Marty
RE: stacked stone retaining wall
Consequently I'm not sure the coefficient of friction is going to come into the problem, since you now have a "gravity wall", ie. it's leaning backwards and as long as any loads from behind, vehicle impact, water pressure, direct UDL on top etc. etc. are less (by a factor of safety of about 2) than the wall reaction, then you'll be OK.
Calculate the above loads v's the actual weight of the wall.
Anthony Tugwell
Project Director & Consulting Engineer - now in Australia