An updating void ratio model for large deformation simulation of geogrid-granular strip anchors plates

Abstract

A modeling approach to investigate the complex behavior of granular trench and reinforcement system is presented in this paper. For this purpose experimental and numerical investigations have been carried out on the behavior of pullout resistance of an embedded strip anchor with and without geogrid reinforcement layers at stabilized loose and dense sand using a granular. Different parameters have been considered, such as number of geogrid layers, embedment ratios, relative density of soil and height ratios of granular trench. For sand and granular trench the CANAsand constitutive model were utilized to investigate failure mechanism and the associated rupture surfaces in the analysis. The obtained results indicate that, when soil was improved with the granular-geogrid trench, the uplift force significantly increased. The ultimate uplift capacity of anchor plate and the variation of surface deformation for all the tests indicated a close agreement between the experimental and numerical models. Also, numerical results show that larger deformations at ultimate pullout load are associated with high void ratios whereas smaller deformations are related with low void ratios.