Assess the Stress-Strain and Interfacial Frictional Behavior of Nonwoven Geotextile Reinforced Residual Soils

In this investigation an attempt has been made to assess the stress-strain and interfacial frictional behavior of geotextile reinforced residual soil with different stress path tests. In detail, the research program concentrated on the study of normally consolidated drained triaxial compression tests of unreinforced and reinforced residual soil on sample size 100 mm diameter and 200 mm high compacted residual soil. Testing was carried out at consolidating pressures ranging 100–600 kPa using a computer control triaxial apparatus. Test observation indicated that the geotextile reinforced soil increased shear strength properties of residual soil in a significant manner. From the result it was also found that reinforced soils exhibit higher failure strains and volume contraction than unreinforced soil. Failure strains, volume change and the percentage increase in strength over soil were also stress path dependent. The simplified prediction procedures to determine the strength of reinforced and unreinforced soils for various stress paths were presented. Charts were also presented to predict the strength of reinforced soil and to determine the coefficient of the interface friction from test results and predictions are satisfactory.