Basic Mechanics Seepage Flashcards
1
Q
What are artesian conditions?
A
When an inclined layer of per able material is overlain by an impermeable material
2
Q
What affects the coefficient of permeability (k value)?
A
Porosity of soil Particle size distribution Particle shape Degree of saturation Temperature of water
3
Q
What is a perched water table?
A
There are two types
Aquitard where water is contained by low permeable material above the water table
Aquiclude where the surrounding material is impermeable
4
Q
What is the difference between consolidation and compaction?
A
Consolidation is the removal of water
Compaction if the removal of air
5
Q
What is a seepage force?
A
When water is seeping through pores the energy transferred from the water to the particles
6
Q
What is “quick” liquefaction?
A
When the seepage force equals the gravitational force therefore the effective stress is is zero and the soil becomes unstable
