Near Hanover / Germany a new industrial estate is planned. A new road leading into this industrial estate has to cross an old landfill area. To improve the bearing capacity of the ground for the road construction a geotechnical structure has been designed, which carries the road embankment and traffic loads. This structure is formed by vibro concrete columns and an embankment reinforced by geogrids. In the paper the different aspects of this design will be explained. Results of calculations according to British Standard BS 8006 and to other models are given and discussed. Some data are presented of plate loading tests on and between the columns and of measurements with an inclinometer in a horizontal pipe placed near to the layer with the geogrids.