The objective of this research is to develop correlations for determining the energy required to liquefy soil and apply the concept to the design of remedial densification programs for prevention of earthquake induce liquefaction. Approach Establish consistent measure of energy to quantify energy capacity and demand, where energy capacity is the energy required to induce liquefaction and energy demand is the energy imparted to the soil. Develop rational approach to normalize energy capacity of soil by confining stress. Using earthquake case histories, develop a correlation between normalized energy capacity and penetration resistance of soil. Calibrate results from computer parameter study with ground densification case histories.
Outline approach for using energy capacity curves in the design of remedial densification programs.
This data was also used to develop a method for normalizing the energy capacity of soil in terms of confining stress. Liquefaction case histories are being evaluated to develop a correlation between normalized energy capacity and penetration resistance of soil. Reports of well documented ground improvement case histories are being collected and reviewed for validation and calibration of the developed procedure.