STUDY ON DIRECT SHEAR TEST ON SAND WITH THE INCLUSION OF GEOTEXTILE AT DIFFERENT ORIENTATION

Abstract

In civil engineering applications, materials are widely used to reinforce retaining walls, roads, highways, and railway ballasts. Therefore, studying the geotextile-soil interaction under Direct Shear is important for any successful design. Soil-reinforcement interaction mechanism has an utmost importance in the design of reinforced soil structures. This mechanism depends on the soil properties, reinforcement characteristics and elements (soil and reinforcement) interaction. In this work the shear strength of an interface between Yamuna sand and two non-woven geotextiles of different strength was characterized through direct shear tests. A series of direct shear tests were conducted to investigate the interface behaviour of soil/geosynthetics. Geotextile is placed at different orientation in shear box and its effect is analysed accordingly. The test equipment, soils, and geosynthetics properties are described. The influence of geotextile in soil and its effect on shear strength parameters i.e. Angle of Internal Friction and the friction and shear behaviour of sand – geotextile interference is discussed by analysing tests results.