Scholarlink

<p>Geogrids are widely used in geotechnical engineering to enhance the mechanical behavior of soil in structures such as mechanically stabilized earth (MSE) walls and reinforced slopes. Their performance is closely tied to the interaction mechanisms at the soil–geogrid interface under shear loading. This study systematically evaluates the key influencing parameters governing this interaction, including transverse rib thickness (t), aperture size (A), average particle diameter (D₅₀) and normal stress through large-scale direct shear testing. Three granular soils were reinforced with 10 × 10, 20 × 20 and 40 × 40&#xa0;mm aperture geogrids with 2, 4 and 6&#xa0;mm rib thicknesses and tested using large scale direct shear device. Test results show maximum 25, 28 and 15% improvement in shear strength at interface for the fine, medium and coarse soils, respectively. Interactions proved to be significantly influenced by A/D<sub>50</sub> ratio with the most effective range varying from 3 to 8. Additionally, for highest passive resistance mobilization and enhancement in shear strength at interface, the thickness of the transverse ribs should be at least 0.7D<sub>50</sub>. Findings of the study are beneficial in practice where improved interactions would reduce the volume of geogrid and fill required, meeting design requirements, addressing space limitations and/or excavation costs, and thereby, help with the feasibility and cost-effectiveness of MSE walls and reinforced slopes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Appraisal of prominent factors on soil- innovative geogrid interaction in direct shear mode

  • 期刊论文

  • 发表日期：

    2026年1月27日

查看全文
  • M. R. Abdi,
  • P. Haghgouy,
  • A. Tabarsa

摘要

Geogrids are widely used in geotechnical engineering to enhance the mechanical behavior of soil in structures such as mechanically stabilized earth (MSE) walls and reinforced slopes. Their performance is closely tied to the interaction mechanisms at the soil–geogrid interface under shear loading. This study systematically evaluates the key influencing parameters governing this interaction, including transverse rib thickness (t), aperture size (A), average particle diameter (D₅₀) and normal stress through large-scale direct shear testing. Three granular soils were reinforced with 10 × 10, 20 × 20 and 40 × 40 mm aperture geogrids with 2, 4 and 6 mm rib thicknesses and tested using large scale direct shear device. Test results show maximum 25, 28 and 15% improvement in shear strength at interface for the fine, medium and coarse soils, respectively. Interactions proved to be significantly influenced by A/D50 ratio with the most effective range varying from 3 to 8. Additionally, for highest passive resistance mobilization and enhancement in shear strength at interface, the thickness of the transverse ribs should be at least 0.7D50. Findings of the study are beneficial in practice where improved interactions would reduce the volume of geogrid and fill required, meeting design requirements, addressing space limitations and/or excavation costs, and thereby, help with the feasibility and cost-effectiveness of MSE walls and reinforced slopes.