Question

Choose the correct option from the following in relation to occurrence of liquefaction of soil:

• A. High ground water table, static load and loose fine sand
• B. High ground water table, static load and dense coarse sand
• C. High ground water table, dynamic load and loose fine sand
• D. High ground water table, dynamic load and dense coarse sand

Hint:

Liquefaction risk: high water table + dynamic load + loose fine sand; avoid such conditions in construction.

Answer 1

The Correct Option is C

The phenomenon of soil liquefaction occurs when saturated soil substantially loses strength and stiffness due to an applied stress such as shaking from an earthquake. Let's analyze the conditions for liquefaction:

1. High Ground Water Table: Liquefaction is more likely when the water table is high, as this increases pore water pressure, reducing soil strength.
2. Dynamic Load: Dynamic or cyclic loading, like seismic activity, agitates soil particles, contributing to liquefaction.
3. Soil Type: Loose fine sands are particularly susceptible to liquefaction. The soil particles are less densely packed, making it easier for pore pressures to disrupt the structure.

The correct combination of these factors is: High ground water table, dynamic load and loose fine sand