Comparison between the Interface Interaction of Sand and Clayey Sand with PET Geogrid in Pullout Test Based on Active Length

Document Type : Research Article

Authors

1 Civil Engineering Department, Imam Khomeini International University

2 Department of civil engineering, Imam Khomeini International University, Qazvin, Iran.

3 Assistant Professor, Faculty of Technical and Engineering, Imam Khomeini International University, Qazvin, Iran

Abstract

Large pullout test is used to investigate the geogrid pullout behavior in the anchorage zone. When the pullout load is applied to the geogrid, this force is gradually transmitted along with the sample until it reaches the end of the geogrid. In order to more accurately investigate the soil-geogrid interaction mechanism, the pullout behavior of geogrid should be evaluated based on the active length. In this study, by performing a series of large-scale pullout tests, the distribution of shear stress and pullout interaction coefficient of a PET geogrid embedded in clean sand and 20% clayey sand were investigated based on active length. The results showed that the value of the pullout force to start the movement of the last geogrid transverse member increased with increasing vertical effective stress in both geogrid embedded in two soil. In all pullout tests, minimum active interaction coefficient was obtained at the conversion of transfer force stage to pullout stage.

Keywords

Main Subjects

References

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Amirkabir Journal of Civil Engineering
Volume 54, Issue 1
April 2022
Pages 95-112

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