Evaluation of two-layered soils reinforced with 3D printed geogrid models under axisymmetric loading conditions

IF 4.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL Geotextiles and Geomembranes Pub Date : 2025-02-16 DOI:10.1016/j.geotexmem.2025.01.008

Gabriel M. Oliveira, Isabel M.C.F.G. Falorca

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Abstract

A series of drained triaxial tests was carried out on homogeneous and two-layered soil (TLS) samples under low confining pressure. A granite aggregate was selected as the base layer, and sand was used to simulate the subgrade. Geogrids with varying aperture sizes and stiffness values were designed using CAD software and manufactured using 3D printing technology. A method for correcting the cross-sectional area during triaxial TLS testing was developed. The load transfer at the aggregate-geogrid interface was also evaluated. The strength of the TLS samples increased as the relation between the aperture size of the geogrid and the median particle diameter was closer to unity. Consistent results were found for the polylactic acid (PLA), photopolymer (RGD 8560), and polypropylene (PP) geogrids, but better mechanical behavior was observed for the RGD 8560 geogrid. Higher tensile forces at the interface were mobilized in geogrids with greater stiffness. However, the best interface behavior is not solely governed by the geogrid stiffness.

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来源期刊

Geotextiles and Geomembranes 地学-地球科学综合

CiteScore

9.50

自引率

21.20%

发文量

111

审稿时长

59 days

期刊介绍： The range of products and their applications has expanded rapidly over the last decade with geotextiles and geomembranes being specified world wide. This rapid growth is paralleled by a virtual explosion of technology. Current reference books and even manufacturers' sponsored publications tend to date very quickly and the need for a vehicle to bring together and discuss the growing body of technology now available has become evident. Geotextiles and Geomembranes fills this need and provides a forum for the dissemination of information amongst research workers, designers, users and manufacturers. By providing a growing fund of information the journal increases general awareness, prompts further research and assists in the establishment of international codes and regulations.