Soil Liquefaction

Question 1

Liquefaction occurs in-

Answer 1

• Saturated/near-saturated cohesionless (sandy) soil
• Pore water pressure build-up under rapid loading (cyclic/static)

Question 2

Mechanism of Liquefaction

Answer 2

• Typical stress-strain curve of liquefiable soil
• Trigger point and Flat critical stress
• In-situ stress > qcr
• Sudden load lift in-situ stress to trigger point
• Result flow failure

Question 3

Triaxial testing invariants are-

Answer 3

q = (σ’1 - σ’3)
p’= (σ’1 + σ’2 + σ’3)/3
p’ = effective confining pressure