CONTACT DENSITY – CONFINING STRESS – ENERGY TO LIQUEFACTION

Abstract eng:
Soil liquefaction phenomenon involves progressive reorganization of intergrain contacts, frictional loss of energy, and eventual collapse of soil skeleton. Resistance to liquefaction depends on the nature and density of active intergrain contacts. Higher the density of active intergrain contacts (per grain) more resistant is the soil to liquefaction. Higher is the confining stress higher is the energy loss along contacts and higher is the resistance to liquefaction. This paper examines this idea analytically and experimentally. A theoretical framework for estimation of an index of active contact density for granular mix soil is presented. Theoretical expression for internal frictional energy loss W is developed. W agrees well with the measured external energy input. Both theory and experimental data indicate that the energy required to cause liquefaction increases linearly with initial effective confining stress and increases log-linearly with intergrain contact density.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket