Experimental Study of Improvement in Tensile Property of Geosynthetics under Confinement

Dan Li, Yihuai Liang, Di Wu, Chen Luo, Yanxin Yang (), Yang Yi and Jianjian Wu
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Dan Li: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Yihuai Liang: School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Di Wu: School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Chen Luo: Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Yanxin Yang: School of Civil Engineering, Sichuan University of Science & Engineering, Zigong 643000, China
Yang Yi: School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China
Jianjian Wu: School of Architecture and Transportation Engineering, Guilin University of Electronic Technology, Guilin 541004, China

Sustainability, 2023, vol. 15, issue 9, 1-20

Abstract: A new in-soil tensile test apparatus was developed to simulate the in-soil stress condition of geosynthetics in a real working state. An in-soil tensile test with or without friction was conducted, along with in-air tensile tests of eight types of geosynthetics, to evaluate tensile properties, including tensile load and secant tensile stiffness under different confining stresses using various methods. Under confinement, the tensile properties of geosynthetics increased with growing confinement, which were greater than those for the in-air tensile test, and the tensile properties were similar for tests with or without friction. The tensile load improvement factors F T − σ and f T − σ were introduced to quantify the confinement and reinforcement–soil friction differences between different tests, and the improvement ratios γ 1 and γ 2 were proposed to quantify the improvement of tensile load under confinement for the test with and without friction, respectively. Two formulas were proposed to predict the confined tensile properties of geosynthetics. The results showed that confinement was the major factor that improved the tensile properties of geosynthetics compared to reinforcement–soil friction. When the improvement ratio is not less than 1.5, the confined tensile load should replace the in-air tensile load with the tensile strength design of geosynthetics, which provides an insight into the design of reinforced soil structures.

Keywords: geosynthetics; confinement; tensile load; secant tensile stiffness; in-soil tensile test; interface friction (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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