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Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface

Node thickening is a way to strengthen the nodes of a geogrid. Increasing the node thickness in conventional biaxial geogrids enhances the interface frictional strength parameters and improves its three-dimensional reinforcement effect. Based on the triaxial tests of aeolian sand, single-rib strip t...

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Autores principales: Du, Wei, Nie, Rusong, Tan, Yongchang, Zhang, Jie, Qi, Yanlu, Zhao, Chunyan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342616/
https://www.ncbi.nlm.nih.gov/pubmed/37444977
http://dx.doi.org/10.3390/ma16134665
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author Du, Wei
Nie, Rusong
Tan, Yongchang
Zhang, Jie
Qi, Yanlu
Zhao, Chunyan
author_facet Du, Wei
Nie, Rusong
Tan, Yongchang
Zhang, Jie
Qi, Yanlu
Zhao, Chunyan
author_sort Du, Wei
collection PubMed
description Node thickening is a way to strengthen the nodes of a geogrid. Increasing the node thickness in conventional biaxial geogrids enhances the interface frictional strength parameters and improves its three-dimensional reinforcement effect. Based on the triaxial tests of aeolian sand, single-rib strip tests of geogrids, and pull-out tests of geogrid in aeolian sand, a three-dimensional discrete element pull-out model for geogrids with strengthened nodes was developed to investigate the mechanical performance of an aeolian sand–geogrid interface. The influences of increasing node thickness, the number of strengthened nodes, and the spacing between adjacent nodes on the mechanical performance of the geogrid–soil interface were extensively studied used the proposed model. The results demonstrated that strengthened nodes effectively optimize the reinforcing performance of the geogrid. Among the three node-thickening methods, that in which both the upper and lower sides of nodes are thickened showed the most significant improvement in ultimate pull-out resistance and interface friction angle. Moreover, when using the same node-thickening method, the ultimate pull-out resistance increase shows a linear relationship with the node thickness increase and the strengthened node quantity. In comparison with the conventional geogrid, the strengthened nodes in a geogrid lead to a wider shear band and a stronger ability to restrain soil displacement. When multiple strengthened nodes are simultaneously applied, there is a collective effect that is primarily influenced by the spacing between adjacent nodes. The results provide a valuable reference for optimizing the performance of geogrids and determining the spacing for geogrid installation.
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spelling pubmed-103426162023-07-14 Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface Du, Wei Nie, Rusong Tan, Yongchang Zhang, Jie Qi, Yanlu Zhao, Chunyan Materials (Basel) Article Node thickening is a way to strengthen the nodes of a geogrid. Increasing the node thickness in conventional biaxial geogrids enhances the interface frictional strength parameters and improves its three-dimensional reinforcement effect. Based on the triaxial tests of aeolian sand, single-rib strip tests of geogrids, and pull-out tests of geogrid in aeolian sand, a three-dimensional discrete element pull-out model for geogrids with strengthened nodes was developed to investigate the mechanical performance of an aeolian sand–geogrid interface. The influences of increasing node thickness, the number of strengthened nodes, and the spacing between adjacent nodes on the mechanical performance of the geogrid–soil interface were extensively studied used the proposed model. The results demonstrated that strengthened nodes effectively optimize the reinforcing performance of the geogrid. Among the three node-thickening methods, that in which both the upper and lower sides of nodes are thickened showed the most significant improvement in ultimate pull-out resistance and interface friction angle. Moreover, when using the same node-thickening method, the ultimate pull-out resistance increase shows a linear relationship with the node thickness increase and the strengthened node quantity. In comparison with the conventional geogrid, the strengthened nodes in a geogrid lead to a wider shear band and a stronger ability to restrain soil displacement. When multiple strengthened nodes are simultaneously applied, there is a collective effect that is primarily influenced by the spacing between adjacent nodes. The results provide a valuable reference for optimizing the performance of geogrids and determining the spacing for geogrid installation. MDPI 2023-06-28 /pmc/articles/PMC10342616/ /pubmed/37444977 http://dx.doi.org/10.3390/ma16134665 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Du, Wei
Nie, Rusong
Tan, Yongchang
Zhang, Jie
Qi, Yanlu
Zhao, Chunyan
Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface
title Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface
title_full Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface
title_fullStr Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface
title_full_unstemmed Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface
title_short Influence of Strengthened Nodes on the Mechanical Performance of Aeolian Sand–Geogrid Interface
title_sort influence of strengthened nodes on the mechanical performance of aeolian sand–geogrid interface
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10342616/
https://www.ncbi.nlm.nih.gov/pubmed/37444977
http://dx.doi.org/10.3390/ma16134665
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