12-04-2012, 03:21 PM
SOIL lIQUEFACTION
SOIL lIQUEFACTION.pptx (Size: 1,003.2 KB / Downloads: 82)
What is Soil Liquefaction
Liquefaction is the phenomenon in which the strength and stiffness of the soil get reduced by earth quake shaking or other rapid loading .
It occurs in saturated , loose and cohesion less soil .
AVOID LIQUEFACTION SUSCEPTIBLE SOIL
HISTORICAL CRITERIA
OBSERVATION FROM EARLIER EARTH QUAKE PROVIDDE A GREAT DEAL OF INFORMATION ABOUT THE LIQUEFACTION OF CERTAIN TYPES OF SOILS AND SITES
GEOLOGICAL CRITERIA
THE TYPE OF GEOLOGICAL PROCESS THAT CREATED A SOIL DEPOSIT HAS A STRONG IFLUENCE ON ITS LIQYEFACTION SUSCEPTIBILITY
COMPOSITIONAL CRITERIA
Soil composed of particle that are all about the same size are more susceptible to liquefaction
Angular particles are less susceptible to liquefaction
STATE CRITERIA
Loser soil are more susceptible to soil liquefaction at a given effective stress
For a given density soil at high effective stress are generally more susceptible to liquefaction