LiquefactionLiquefaction

ByLakshmi Ganesh S (14481D8718)Syed Jeelani Basha (14481D8720)

Outline Introduction Liquefaction susceptibility Types of failure Remedial Measures Liquefaction resistant

structures

Introduction The Phenomenon, in which soil acts as a liquid

due to loss of shear strength, is known as “LIQUEFACTION”.

This type of phenomenon occurs mainly at the time of earthquakes..

Look Closer?

This is how it looks…

Liquefaction Susceptibility Soil type

Particle size and gradation

Initial relative density(ID)

Characteristics of Vibration

Age of Soil deposit

Types of Failure Cyclic Mobility Overturning Sand Boiling

Cyclic Mobility

Overturning

Sand Boiling

Remedial Measures Compaction Drainage Grouting Deep Foundation

Compaction

Drainage

Grouting In this method the soil is stabilized by injecting the chemical or

cement grout into the soil. The chemical reaction between the soil and chemical increases the cohesion consequently the shear strength of soil

Deep Foundation

Liquefaction Resistant Structures Shallow foundation aspect

Deep foundation aspect

Liquefaction Resistant Structures Shallow foundation aspect

Liquefaction Resistant StructuresDeep foundation aspect

Conclusion: Liquefaction is a seismic hazard that deserves attention in

design of new construction and evaluation of existing construction

Proper remedial measures should be followed in order to prevent the failure of structure due to liquefaction

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