GATE 2017 CE (CE1) – Question 18

Geotechnical Engineering · Shear strength, Mohr circle, stress-strain characteristics, stress paths · 1 mark · Multiple choice

Match the soil strength changes to their responsible properties/processes. P: regain with time; Q: loss due to cyclic loading; R: loss due to upward seepage; S: loss due to remoulding. Processes: 1 boiling, 2 liquefaction, 3 thixotropy, 4 sensitivity.

P–4, Q–1, R–2, S–3
P–3, Q–1, R–2, S–4
P–3, Q–2, R–1, S–4
P–4, Q–2, R–1, S–3

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Show answer and explanation

Correct answer: (C) P–3, Q–2, R–1, S–4

Explanation

Thixotropy describes time-dependent regain of strength in remoulded soil, so P–3. Cyclic loading can build pore pressure and cause liquefaction, Q–2. Upward seepage can reduce effective stress to zero, causing boiling, R–1. Sensitivity is the ratio of undisturbed to remoulded strength, measuring remoulding loss, S–4. The complete match is C.

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