Abstracto

Influence of Different Types of Soils on Soil- Geosynthetics Interaction Behavior

Awdhesh Kumar Choudhary, A. Murali Krishna

Interaction behavior of soil-geosynthetic system is of great importance in design and analysis of reinforced soil structures. Type of soil and geosynthetic influence the parameters describing the interaction. In general, interaction parameters of soilgeosynthetic system are generally determined by direct shear and pullout tests. This paper presents the influence of different types of soils and geosynthetics on the interaction behavior of soil-geosynthetics system using direct shear tests. Large scale direct shear tests were conducted for the purpose using four different types of cohesionless soils and two types of geosynthetics (woven and nonwoven). The results are presented and discussed in terms of peak shear resistance, interface friction angle and efficiency factors for different soils and geosynthetics. It is observed that the interface friction angle values are significantly affected with soil type and geosynthetic material. Efficiency factors are not affected with type of soil for a selected geosynthetic material. However, different efficiency factors for different geosynthetic materials are observed. For the range of materials tested at the 50 kPa normal stress the range of efficiency factors is 0.4-0.45.