Study on Interface Interaction between Uniaxial Geogrid Reinforcement and Soil Based on Tensile and Pull-Out Tests

Xiaoguang Cai, Jiayu Feng, Sihan Li (), Honglu Xu, Weiwei Liu and Xin Huang
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Xiaoguang Cai: College of Geological Engineering, Institute of Disaster Prevention, Sanhe 065201, China
Jiayu Feng: College of Geological Engineering, Institute of Disaster Prevention, Sanhe 065201, China
Sihan Li: College of Geological Engineering, Institute of Disaster Prevention, Sanhe 065201, China
Honglu Xu: Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China
Weiwei Liu: Aolai Guoxin (Beijing) Testing Technology Co., Ltd., Beijing 101318, China
Xin Huang: College of Geological Engineering, Institute of Disaster Prevention, Sanhe 065201, China

Sustainability, 2022, vol. 14, issue 16, 1-16

Abstract: The interaction between reinforcement and soil is a key problem in the application of geosynthetics as reinforcement in geotechnical engineering. In this study, tensile and pull-out tests on a uniaxial geogrid were carried out using self-designed tensile and pull-out test equipment. The tensile test evaluated the tensile load–strain characteristics of a geogrid. Under the condition of lateral confinement, the tensile force and secant tensile stiffness of the geogrid increased with an increase in the normal stress when the strain was constant, and the secant tensile stiffness decreased with a decrease in the tensile rate. The stiffness coefficient was used to quantitatively describe the change in the stiffness of the reinforcement. Using the pull-out test, the variation laws of the pull-out force of the geogrid under different normal stresses and different longitudinal rib percentages were obtained. When the geogrid was broken, the pull-out force of the same type of geogrid was not significantly different under different normal stresses. With an increase in the longitudinal rib percentage, the pull-out force of the geogrid under the same normal stress gradually increased, and the apparent friction coefficient was obtained by analysis. The results of the apparent friction coefficient obtained by the analytical method in accordance with French specifications (NF P94-270-2020) are relatively safe compared to the experimental values.

Keywords: uniaxial geogrid; tensile test; pull-out test; tensile properties; friction coefficient (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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