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LEADERSHIP QUOTE OF THE DAY (23 May 2012): You gain STRENGTH| COURAGE AND CONFIDENCE by every experience in which you really stop to look fear in the face. You must do the thing you think you cannot do. - Eleanor Roosevelt

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What Is 'Liquefaction'?

Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading.

Liquefaction and related phenomena have been responsible for tremendous amounts of damage in historical earthquakes around the world.

Liquefaction occurs in saturated soils, that is, soils in which the space between individual particles is completely filled with water.

This water exerts a pressure on the soil particles that influences how tightly the particles themselves are pressed together. Prior to an earthquake, the water pressure is relatively low. However, earthquake shaking can cause the water pressure to increase to the point where the soil particles can readily move with respect to each other.

Schematic behaviour of sand grains in a soil deposit during liquefaction. The blue column represents the pore water pressure.

When liquefaction occurs, the strength of the soil decreases and, the ability of a soil deposit to support foundations for buildings and bridges is reduced as seen in the photo (SC) of the overturned apartment complex buildings in Niigata in 1964.

Also See: examples of 'liquefaction' here

Slay Demons. Bang Heads. Become A Legend.

Brütal Legend stars Jack Black as Eddie Riggs, the greatest roadie who ever lived.

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