A Hybrid Finite/Discrete Element Method for Analysis of Unpaved Roads Reinforced by Geotextiles
A 3-D discrete/finite element method for analysis of unpaved roads reinforced with geotextiles is presented. The foundation soil is soft, normally consolidated soil and is modelled by 3-D finite elements. The geotextile, fill and the contacts geotextile — soft soil and geotextile — fill are modelled by discrete elements. The foundation soft soil is modelled using a modified Tresca failure criterion and associated flow rule to account for stiffness and strength degradation due to cyclic traffic loading. A PC program based on the method is developed. The program consists of a pre-processor module helping the user to prepare input data and to preliminarily design the geotextile and the thickness of the fill, analysis module and a post-processor module displaying the results. The use of the method is illustrated by examples.
KeywordsSoft Soil Secant Modulus Cyclic Shear Unpaved Road ASCE Journal
Unable to display preview. Download preview PDF.
- Andersen K.H., A.Kleven and D.Heien — (1988) — Cyclic Data for Design of Gravity Structures. ASCE Journal of Geotechnical Engineering, vol. 114,No.5.Google Scholar
- Fannin, R.J. & O. Sigurdsson — (1996) — Field observations on stabilization of unpaved roads with geotextiles. ASCE Journal of Geotechnical Engineering, Vol.122, No.7.Google Scholar
- Giroud, J-P. and L. Noiray — (1981) — Geotextile-Reinforced unpaved road design. ASCE Journal of the Geotechnical Engineering Division, Vol. 107, No.GT9.Google Scholar
- Houlsby, G.T. & R.A. Jewell — (1990) — Design of reinforced unpaved roads for small rut depths. Geotextiles, Geomembranes and Related Products, Den Hoedt (ed.) Balkema, Rotterdam.Google Scholar