fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff

1. Introduction to
Liquefaction

2. What is Liquefaction?
 Liquefaction-when the strength and
stiffness of a soil is reduced due to
earthquake shaking
 Liquefaction occurs in saturated soils

3. Niigata 1964 and Kobe, Japan 1995

5. Outline
 Background
 Effect of liquefaction
 Types of failure
 Remedial Measures

6. History
 Serious attention because of Japan, Alaska and Nigata
earthquake in 1964.

7. Look Closer?

8. Types of
Failure

9. Cyclic Mobility

10. Overturning

11. Sand Boiling

12. Remedial Measures

13. Wrap Up
1. Why is liquefaction dangerous?
2. What do you need for liquefaction to
occur?
A. dry soil and an earthquake
B. saturated soil and an earthquake
C. saturated soil

14. Wrap Up
1. Why is liquefaction dangerous?
Liquefaction can cause buildings and
infrastructure to collapse.
2. What do you need for liquefaction to
occur?
A. dry soil and an earthquake
B. saturated soil and an earthquake
C. saturated soil