Effect of Moisture Content on the Shear Characteristics of the Interface Between Residual Soil and Geotextile
FENG Min
SONG Wenjie
Abstract：In order to investigate the shear characteristics of the interface between residual soil and geotextile under different influence factors,the direct shear tests were carried out on the residual soil samples reinforced with geotextile by using pneumatic direct shear apparatus.Considering moisture content,shear rate,vertical stress and other factors,the effect of moisture content on the shear characteristics of the interface between residual soil and geotextile under different shear rates and vertical stresses is analyzed.The test results show that the shear strength of the reinforced soil interface is proportional to the vertical stress under the same moisture content,and when the moisture content is 17%,the shear strength of the vertical stress of 50 kPa increases from 53 kPa to 84 kPa(100 kPa)and 151 kPa(200 kPa),respectively.With the increase of moisture content,the apparent cohesion and shear strength of the reinforced soil interface decrease significantly,but the friction angle of the soil interface has no obvious change.The shear rate mainly affects the friction angle of the reinforced soil interface,and the shear strength of the reinforced soil interface increases with the increase of shear rate.In the case of high shear rate and low moisture content,the shear shrinkage of the interface is relieved after reaching a certain shear displacement,and finally tends to be stable.
Keywords：Reinforced soilInterface between geogrid and soilDirect shear testShear strengthMoisture content
Publication Date：2024-03-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 157-164 )