In a soil investigation for a construction project, two soiltypes were identified with the following parameters (g = 9.81m/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 is0.69, find the expected settlement in the clay layer only due to aproposed foundation that should imposes a pressure of 60kN/m2 on the mid-depth of the clay layer. Theoverconsolidation pressure is 125 kN/m2. What is the thetotal settlement due to both the sand and clay layers (to themid-height of the clay layer)?
