Effects of particle breakage on the mechanical characteristics of geogrid-reinforced granular soils under triaxial shear: A DEM investigation

被引：27
作者：
Shi, Danda [1 ]
Niu, Jinzhong [1 ]
Zhang, Jiao [2 ]
Chao, Zhiming [1 ]
Fowmes, Gary [3 ]
机构：
[1] Shanghai Maritime Univ, Sch Ocean Sci & Engn, Shanghai 201306, Peoples R China
[2] Shanghai Urban Construct Vocat Coll, Sch Municipal & Ecol Engn, Shanghai 200432, Peoples R China
[3] Univ Warwick, Sch Engn, Coventry CV4 7AL, England
来源：
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT | 2023年 / 34卷
基金：
中国国家自然科学基金;
关键词：
Geogrid-reinforcement; Particle breakage; Triaxial shear test; Discrete element method; Granular soils; HYDRAULIC CONDUCTIVITY; FABRIC EVOLUTION; CALCAREOUS SAND; BEHAVIOR; DEFORMATION; SIMULATION; GRAINS; SIZE; FRAGMENTATION; COMPRESSION;
D O I：
10.1016/j.gete.2023.100446
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A series of numerically triaxial shear tests on crushable and uncrushable granular soils reinforced by geogrid were conducted using 3-Dimension Particle Flow Code. The macroscopic behaviors of crushable and uncrushable granular soil during shearing were compared. Also, the underlying macro-micro linkages were explored. The main findings are as follows: Particle breakage decreases the contact forces between soil particles to reduce the shear strength of granular soils; The reinforcement effect of geogrids on the shear strength of granular soils can be attributed to the increase in fabric and force anisotropies; The particle displacement distribution of crushable soil samples is more uniform than that of uncrushable samples, and the shear band of crushable samples is not obvious; The reinforcement effect of geogrid with the aperture size ratio of 4.4 is the highest among the samples because the number of crushed particles and the deformation of geogrids reaches a balance.& COPY; 2023 Elsevier Ltd. All rights reserved.
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页数：20
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