Revised Design Models for Geogrid Reinforced Soil Walls and LRFD Calibration

This paper reports the results of load and resistance factor design (LRFD) calibration for pullout limit states for geogrid reinforced soil walls owing to soil self-weight loading plus permanent uniform surcharge. The calibration method uses bias statistics to account for prediction accuracy of the deterministic models for reinforcement load and pullout capacity, and random variability in input parameters. New revised design models are proposed to improve load/resistance prediction accuracy based on current design manual established by Public Work Research Center of Japan. And load and resistance factors are proposed that give a uniform probability of failure of 1%.