Simulating Plane Strain Tests of Sand Specimen Rei

Authors: S L Zhang M X Zhang A A Javadi

Publish Date: 2008

Volume: , Issue: , Pages: 234-237

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Abstract

Soil reinforced with horizontalvertical HV orthogonal inclusions is a new concept of reinforced soil In the HV reinforced soil besides the traditional horizontal reinforcements vertical reinforced elements are also placed on the horizontal ones in spacing When the soil structure reinforced with HV inclusions is subjected to load besides the frictional resistances between soil and the horizontal inclusions passive resistances in the soil enclosed within the HV reinforcing elements will be provided Passive resistances and frictional ones not only strengthen the reinforced soil but also restrict the deformation of the soil and then increase the strength and stability greatly The HV inclusions influenced the movement of the soil particles and changed the shear band of the reinforced soil A series of plane strain tests of sand specimen reinforced with HV orthogonal inclusions were carried out Particle Flow Code PFC based on the discrete element theory was introduced to simulate the plane strain tests of HV reinforced sand The macro stressstrain relation of sand was reproduced and verified by PFC model The occurrence and propagation of shear band was analyzed by the confining pressuretime history and the displacement and movement of the soil particles of PFC model The effect of configuration of HV inclusions stiffness and position of the reinforcements particle size on the formation and extension process of the shear band were discussed The comparison between the results from plane strain tests of sand specimen reinforced with HV orthogonal inclusions and the ones by PFC shows the PFC model can simulate the propagation of shear band and failure of the sand specimen reinforced with HV orthogonal inclusions accurately

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