Analytical Study upon Reinforced Embankment Stability by Geotextile with High Tensile Stiffness

概要

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This paper discusses about the effects of the tensile stiffness of the reinforcing materical upon the deformation and tensile stress in the reinforced embankment. First, it is demonstrated that the finite element method could accurately predict the actual deforming patterns of the embankment through comparing the observed data at the full-sized reinforced embankment model by the FRP geotextile (height: 5m, slope: 1:0.3) with the analytical results. The validity of the finite element method has been also confirmed by comparing the theoretical results by the slope stability analysis for the non-reinforced embankment with the corresponding results by the finite element method. Next, the stability of the geotextile as the reinforcing material has been examined by the finite elememt analysis in the five embankment models reinforced with the various tensile stiffness.Through the analyses proposed in this paper, following results are obtained:1. The deformation of the embankment could be controlled to some extent due to the use of the reinforcing materical whose tensile stiffness may be higher than the modulus of elasticity of the ground.2. The tensile strenght of the reinforcing materical could increase with its tensile stiffness while the rate of the increase could not be large.
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