Question

Consider the following statements:
1. Quick condition and liquefaction of saturated sands are based on similar phenomenon.
2. Quick condition is associated with only earth dams.
3. Liquefaction is possible in dry sand.
4. Liquefaction is associated with increase in pore water pressure due to vibrations.
Which of these statements are correct?

• A. 2 and 4
• B. 1 and 4
• C. 1 and 2
• D. 1, 3 and 4

Answer 1

The correct option is B 1 and 4

When the effective stress is zero soil looses its strength and behave as a liquid. The phenomenon of quick condition is due to flow of water through the soil. While liquefaction occurs due to vibration caused by earthquake, explosion, volcanic eruption etc. However, in both cases effective stress becomes zero.