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Introduction to Liquefaction

Introduction to Liquefaction. What is Liquefaction?. Liquefaction-when the strength and stiffness of a soil is reduced due to earthquake shaking Liquefaction occurs in saturated soils. Niigata 1964 and Kobe, Japan 1995. Earthquake Video. Liquefaction In Niigata Earthquake 1964

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Introduction to Liquefaction

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  1. Introduction toLiquefaction

  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

  4. Earthquake Video Liquefaction In Niigata Earthquake 1964 Liquefaction Demo Liquefaction Demo 2 Could we make a better video today?

  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 Up1. 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 Up1. 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 earthquakeB. saturated soil and an earthquake C. saturated soil

  15. Questions?

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