37.2.3. Build-up of Excess Pore Water Pressure

Try these first

1. 1.

   What happens to pore water pressure under cyclic loading?

   Hint

   Think about how water behaves in saturated soils during shaking.

2. 2.

   What is effective stress?

   Hint

   Consider this as the total stress you need to take into account when the soil is saturated.

3. 3.

   What is the primary effect of cyclic loading on pore water pressure?

   • Decreases the pressure
   • Increases the pressure
   • Has no effect

   Hint

   Remember how water moves in response to external forces.

4. 4.

   True or False: Effective stress increases when pore water pressure increases.

   • True
   • False

   Hint

   Refer to the definitions of effective stress.

5. 5.

   Evaluate how the increase in pore water pressure contributes to ground failures during a specified historical earthquake.

   Hint

   Refer to historical accounts and data from geological surveys.

6. 6.

   In a hypothetical scenario where ground improvements are neglected in a liquefiable soil area, predict the outcomes during a significant seismic event.

   Hint

   Consider what factors could fail without proper engineering solutions.