Soil liquefaction

Soil Liquefaction

Objetive

This lecture introduces the concept of soil liquefaction and what causes it.

Introduction

Soil liquefaction has always ocurred with earthquakes, but it really wasn't until the 1960's thats started to understand the mechanist of it.

Liquefaction

Under saturated loose sand situations

Application of a shear force will cause the soil particles to shift and reconfigure themselves.

Under undrained conditions

The pore water can't escape, the soil particles hydroplane and have little to no shear strenght.

Different type of general liquefaction

Flow liquefaction

Cyclic mobility

Sudden and usually cotastrophic soil deformations.

Soil at difference of flow liquefaction here liquefies and move in lurches, like a ratcheting effect.

3 critical aspects

Liquefaction susceptibility, Liquefaction initiation and liquefaction effects.