Numerical study on bored Pile-Soil interaction by specified constitutive model in coastal engineering (design)

Abstract

In Geo-engineering design, Geotech-engineers usually adopt ‘Mohr-Coulomb model (M-C)’ to substitute most soil material, this model is considered as linear elastic and perfectly plastic model, despite, in the coastal engineering, the sand-clay mixed with water, cement, fine aggregate or similar materials are the most common interface medium among soil and pile bodies, the frictions from them have strong affection on piles settlements, due to their complex components and mechanics, never can simulate these interface medium by ‘M-C model’ easily, hereby, the novelty of this article is that author adopt ‘Hardening soil constitutive model (HSs)’ as the interface medium and deployed numerical studies on its application in practical case, the studies included simulating the mechanic behaviors among soil and piles(morphology of deformation), design assumptions based on the analysis of geotechnic report and empirical views, besides compared the pile settlement curves by ‘M-C’ and ‘HSs’ models with the static loads test results, and identified the ‘HSs’ model is a suitable constitutive model for sand-clay mixture soil in this Geo project design. In the end, author proposed a few conclusions about the medium birth mechanism, criteria of model selection and advice for similar engineering reference.