DESIGN OF A ROAD EMBANKMENT REINFORCED USING A GEOGRID.

The article presents design and verification of a road embankment supported by reinforced retaining walls with a passive facing system, which was the most optimal and effective method to design a road embankment in a cramped space in a flyover intersection of highways. The cross section presented in the paper consists of three roads at different levels, when the road in the middle is placed about 8 m above the other ones. The design was done using the analytical computational model and the numerical modelling, based on FEM, to obtain the most effective and reliable design. The analytical computational models solve the problems separately for verification of internal stability, global stability as well as the settlement of the subsoil below the embankment. The tension forces for geogrids were determined on the internal stability calculation. The numerical modelling solves the problem as a one complex, where all deformations and forces depend on each other. The numerical modelling showed that the most critical verification was the verification of the global stability. The numerical modelling showed that the embankment will collapse concurrently to both sides and not only to the one of the sides as it was assumed by the analytical approach. [ABSTRACT FROM AUTHOR]