A sand layer of 3 m thick lies on a 3 m clay deposit. The water table is below 2 m of the ground surface. There is a 1 m capillary rise above the water table. Below the clay, there is a 2 m of a sand layer that lies on a bedrock. Piezometers installed at the bottom of the clay layer show an artesian pressure, the piezometric level being 1 m above the ground surface. The saturated and dry unit weight of the sand is 18 and 16 kN/m3 , respectively. The saturated unit weight of the clay is 20 kN/m3 . An embankment is going to be placed at the ground surface and will apply a 30 kPa uniform surcharge. Calculate and draw the total, pore pressure, and effective stress profiles for the following conditions. a) before the embankment is placed b) immediately after the embankment is placed c) long after the embankment is placed
A sand layer of 3 m thick lies on a 3 m clay deposit. The water table is below 2 m of the ground surface.
There is a 1 m capillary rise above the water table. Below the clay, there is a 2 m of a sand layer that lies
on a bedrock. Piezometers installed at the bottom of the clay layer show an artesian pressure, the
piezometric level being 1 m above the ground surface. The saturated and dry unit weight of the sand is 18
and 16 kN/m3
, respectively. The saturated unit weight of the clay is 20 kN/m3
. An embankment is going to
be placed at the ground surface and will apply a 30 kPa uniform surcharge. Calculate and draw the total,
pore pressure, and effective stress profiles for the following conditions.
a) before the embankment is placed
b) immediately after the embankment is placed
c) long after the embankment is placed
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