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Investigating Static Pullout Behavior of Two Geocomposite Reinforcements Embedded in One-Layer and Two-Layer Soils

Investigating Static Pullout Behavior of Two Geocomposite Reinforcements Embedded in One-Layer... This study was conducted to investigate the pullout behavior of two types of geocomposites. These include two geocomposite reinforcements)soil geocomposite (SGCP) and combigrid (CMB)( embedded in one-layer soil (sand-geocomposite and gravel-geocomposite) and two-layer soil (sand-geocomposite-gravel). Experimental laboratory studies were performed using a large-scale pullout test apparatus under vertical stresses of 20, 40, and 60 kPa. The results showed that vertical stress is an effective factor in increasing pullout resistance also has a significant effect on changing rupture and displacement at the maximum pullout resistance of SGCP and CMB embedded in one-layer and two-layer soils. Also, in conditions where vertical stress is constant, soil type and one-layer and two-layer can effectively change the failure mode of geocomposites. Despite almost identical tensile resistance of SGCP and CMB, the pullout test results showed that in all one-layer and two-layer soils, CMB reinforcement had higher pullout resistance and interaction coefficients than SGCP. Better performance of the CMB can be due to passive resistance mobilized against transverse elements of the geogrid attached to the non-woven geotextile of the CMB reinforcement, as well as better strength and non-rupture of the CMB compared to the SGCP while pulling out of the soil. It was also observed that ،placement of SGCP and CMB at the interface of two-layer soil improved behavior of the reinforced soil compared to the one-layer state, and better performance of two geocomposite reinforcements was observed in two-layer soil compared to one-layer soil. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Geosynthetics and Ground Engineering Springer Journals

Investigating Static Pullout Behavior of Two Geocomposite Reinforcements Embedded in One-Layer and Two-Layer Soils

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References (30)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022
ISSN
2199-9260
eISSN
2199-9279
DOI
10.1007/s40891-022-00378-y
Publisher site
See Article on Publisher Site

Abstract

This study was conducted to investigate the pullout behavior of two types of geocomposites. These include two geocomposite reinforcements)soil geocomposite (SGCP) and combigrid (CMB)( embedded in one-layer soil (sand-geocomposite and gravel-geocomposite) and two-layer soil (sand-geocomposite-gravel). Experimental laboratory studies were performed using a large-scale pullout test apparatus under vertical stresses of 20, 40, and 60 kPa. The results showed that vertical stress is an effective factor in increasing pullout resistance also has a significant effect on changing rupture and displacement at the maximum pullout resistance of SGCP and CMB embedded in one-layer and two-layer soils. Also, in conditions where vertical stress is constant, soil type and one-layer and two-layer can effectively change the failure mode of geocomposites. Despite almost identical tensile resistance of SGCP and CMB, the pullout test results showed that in all one-layer and two-layer soils, CMB reinforcement had higher pullout resistance and interaction coefficients than SGCP. Better performance of the CMB can be due to passive resistance mobilized against transverse elements of the geogrid attached to the non-woven geotextile of the CMB reinforcement, as well as better strength and non-rupture of the CMB compared to the SGCP while pulling out of the soil. It was also observed that ،placement of SGCP and CMB at the interface of two-layer soil improved behavior of the reinforced soil compared to the one-layer state, and better performance of two geocomposite reinforcements was observed in two-layer soil compared to one-layer soil.

Journal

International Journal of Geosynthetics and Ground Engineering – Springer Journals

Published: Jun 1, 2022

Keywords: Soil geocomposite; Combigrid; One-layer soil; Two-layer soil; Pullout resistance; Pullout interaction coefficient

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