In: Civil Engineering
In a soil investigation for a construction project, two soil types were identified with the following parameters (g = 9.81 m/s2):
Soil Type |
Depth below ground level (m) |
Unit weights (kN/m3) |
Other parameters |
Soil 1 (sand) |
6.5 |
g = 17 and gsat = 17.5 |
E =15000 kN/m2 |
Soil 2 (overconsolidated clay) |
11.5 |
gsat = 20 |
e0=0.69, Cc=0.25, Cs=0.05 |
If the ground water level is at 2.5 m below the ground level, and the initial void ratio of the overconsolidated clay layer is 0.69, find the expected settlement in the clay layer only due to a proposed foundation that should imposes a pressure of 60 kN/m2 on the mid-depth of the clay layer. The overconsolidation pressure is 125 kN/m2. What is the the total settlement due to both the sand and clay layers (to the mid-height of the clay layer)?