GATE CE 2022 Set 2 — Question 55
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Geotechnical Engineering → Consolidation → Degree of Consolidation
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Question
A saturated compressible clay layer of thickness is sandwiched between two sand layers, as shown in the figure. Initially, the total vertical stress and pore water pressure at point P, which is located at the mid-depth of the clay layer, were and , respectively. Construction of a building caused an additional total vertical stress of at P. When the vertical effective stress at P is , the percentage of consolidation in the clay layer at P is _____________ . (in integer)

Correct answer
50 to 50
Solution
1.Initial State at P:
- Total vertical stress,
- Pore water pressure,
- Initial effective stress,
- Additional total vertical stress,
- This additional stress is initially carried by excess pore water pressure ().
- Final effective stress,
- Current effective stress,
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