EFFECTS OF GEOGRID AND NON-WOVEN GEOTEXTILES ON THE SHEAR BEHAVIOR OF SOIL

Abstract

Geosynthetic reinforcement plays a significant role in construction projects by stabilizing and enhancing the bearing capacity of soil. However, the complex interactions between soil and geosynthetic materials are open for investigation. This study aims to elucidate interactions by examining the effects of various geosynthetic materials, specifically nonwoven geotextile and geogrid, on the shear strength of fractional sand. Direct shear tests were performed on sand specimens incorporating geosynthetics arranged in multiple configurations to assess their influence on soil strength properties. The test results showed that the soil friction angle changed from 29° to 38°, which is the advantage of geogrid in improving soil properties. The use of nonwoven geotextile increased the cohesion from 8 kPa to 15kPa. The methodology of the test using the location of the reinforcing material also has its peculiarities, which are summarized in the discussion of the results obtained. The findings of this research contribute to a deeper understanding of how the type and characteristics of geosynthetic materials affect soil performance to refine the design and application of reinforcement strategies in construction engineering. The results can be applied in the design of roadways and foundations, where enhanced soil stability is crucial for structural integrity and to the formulation of effective erosion control strategies in civil engineering projects.