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GATE CE 2021 Set 2 — Question 55

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NAT+2 / -0MediumConsolidation SettlementConsolidationGeotechnical Engineering

Geotechnical Engineering → Consolidation → Consolidation Settlement

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Question

The soil profile at a road construction site is as shown in figure (not to scale). A large embankment is to be constructed at the site. The ground water table (GWT) is located at the surface of the clay layer, and the capillary rise in the sandy soil is negligible. The effective stress at the middle of the clay layer after the application of the embankment loading is 180 kN/m2180\text{ kN/m}^2. Take unit weight of water, γw=9.81 kN/m3\gamma_w = 9.81\text{ kN/m}^3.
Soil profile showing a 2 m sand layer with unit weight 18.5 kN/m^3 above a 6 m clay layer with G_s = 2.65, w = 45%, and C_c = 0.25. The GWT is at the interface.
The primary consolidation settlement (in m, round off to two decimal places) of the clay layer resulting from this loading will be ___________
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