Basic 1D settlement
Basic 1D settlement
(OP)
Hi,
A simple equation for primary settlement is:
primary settlement = (change in void ratio)*(depth of soil)/(1+ e0)
If you consider a small element of soil, the equation seems to suggest that as the initial void ratio, e0, increases, the amount of settlement will decrease. I would have thought that as the void ratio increases the settlement would also increase. Can someone explain? Thanks.
-Andrew





RE: Basic 1D settlement
In the real world, applying a given stress increase to a same thickness layer for two different soils, one with high void ratio and the other with a lower void ratio, the delta e resulting is much higher for the high void ratio condition as compared to the low void ratio condition. This change is much greater than the (1+e) difference.
Thus, the resulting answer explains why high void ratio soil compressed more than the low void ratio material.
Ya gotta look at both top and bottom parts of the equation.
RE: Basic 1D settlement