Authors : Chelghoum Noureddine , Boumekik Ahmed and Hamami Mounir
Abstract: Most of the available design methods for reinforced soils deals with the limit equilibrium of the system. They also involve certain assumptions regarding the properties of the materials used and the behaviour of the system at failure. In many of these the same assumptions are made as in classical earth pressure and slope stability analysis and adopted to develop simple analytical models. In addition, the internal stability of these soil inclusion systems is generally analysed by considering: (a) The rupture of reinforcing element, (b) Failure by lack of adherence between the soil and the reinforcement. However, for soil incorporating polymers, which are strain controlled systems, a limiting serviceability condition related to structures deformation must be considered and the operational properties of both the soil and the reinforcement established. Moreover, for such systems there must be strain compatibility between the soil and the reinforcement at all times. Hence the strenght parameters for reinforcement must be measured over the same range of lateral strain as can occur in the soil. This study presents the effect of confining pressure on the lateral strain of two different granular materials in a 100 mm x 100 mm diameter triaxial with lubricated ends and checks the validity of some of the assumptions made regarding these strains. The results show that all the lateral strains developed from the end of consolidation stage are tensile strains. The lateral tensile strain corresponding to the peak stress ratio is constant irrespective of the cell presures used. The lateral strains developed at constant volume are different from one soil to another.
Chelghoum Noureddine , Boumekik Ahmed and Hamami Mounir , 2006. Effect of Confining Pressure on Lateral Strain of Cohesionless Soil. Journal of Engineering and Applied Sciences, 1: 360-369.