Strain rate effects on soil-geosynthetic interaction in fine-grained soil

Maryam Safa , Amin Maleka , Mohammad-Ali Arjomand , Masoud Khorami , Mahdi Shariati

Abstract

Geosynthetic reinforced soil method in coarse-grained soils has been widely used in last decades. Two effective factors on soil-geosynthetic interaction are confining stresses and loading rate in clay. In terms of methodology, one pull-out test with four different strain rates, namely 0.75, 1.25, 1.75 and 2.25 mm/min, and three different normal stresses equal to 20, 50 ,and 80 kg have been performed on specimens with dimensions of 30x30x17 cm in the saturated, consolidated condition. The obtained results have demonstrated that activation of geosynthetic strength at contact surface depends on the applied stress. In addition, the increase in normal stress would increase the shear strength at contact surface between clay and geogrid. Moreover, it is concluded that the strain rate increment would increase the shear strength.

Key Words

reinforced soil; saturated and consolidated soil; geosynthetic; strain rate; pull-out test

Address

Maryam Safa — Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
Amin Maleka — Department of Civil Engineering, Faculty of Engineering, Roudehen Branch, Islamic Azad University, Roudehen, Iran
Mohammad-Ali Arjomand — Faculty of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran
Masoud Khorami — Department of Civil Engineering, Faculty of Engineering, Central Branch, Islamic Azad University, Tehran, Iran
Mahdi Shariati — 1.) Division of Computational Mathematics and Engineering, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City, Vietnam 2.) Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

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