An 8.5 m thick layer of normally consolidated clay (Cc = 0.35, e₀ = 1.2) has an effective vertical stress of 115 kPa at its mid-depth. A wide fill raises the vertical stress in the clay by 140 kPa. Treat the layer as one sublayer with the stresses at its mid-depth. Find the primary consolidation settlement S in mm.
A 3 m thick layer of normally consolidated clay (Cc = 0.6, e₀ = 0.65) has an effective vertical stress of 115 kPa at its mid-depth. A wide fill raises the vertical stress in the clay by 35 kPa. Treat the layer as one sublayer with the stresses at its mid-depth. Find the primary consolidation settlement S in mm.
A 3.5 m thick overconsolidated clay layer has Cc = 0.3, Cr = 0.05 and e₀ = 1.2. At its mid-depth the effective vertical stress is 40 kPa and the overconsolidation ratio is OCR = 2.5. A new building adds 130 kPa of vertical stress at mid-depth. Find the primary consolidation settlement S in mm.
A 6 m thick overconsolidated clay layer has Cc = 0.4, Cr = 0.04 and e₀ = 1. At its mid-depth the effective vertical stress is 90 kPa and the overconsolidation ratio is OCR = 3. A new building adds 140 kPa of vertical stress at mid-depth. Find the primary consolidation settlement S in mm.
In a laboratory oedometer test, a clay specimen 19 mm thick, drained at the top and bottom, reaches 50% consolidation in 12 min. In the field the same clay forms a layer 6 m thick. It lies on impervious rock, with sand above it, so water drains out only at the top. How many days t does the field layer take to reach 50% consolidation?
A clay layer 2.5 m thick has a coefficient of consolidation cv = 2 m²/year. It lies on impervious rock, with sand above it, so water drains out only at the top. For 80% average consolidation the time factor is Tv = 0.567. How many years t does the layer take to reach 80% consolidation?
Full step-by-step solutions: practise this topic on examproblems.com.