Deep vibrocompaction is an established method for the improvement of loose sandy soils using deep vibrators. In a basic modelling concept, the area of the ground influenced by the vibrator is subdivided into three concentric cylindrical zones. According to that model, the compaction occurs only in some distance to the vibrator, since the acceleration amplitudes in the vicinity, the so-called fluidised zone, are considered too large. Fluidisation is defined and distinguished from liquefaction. Both phenomena can occur in the vicinity of the vibrator and so both have to be adequately considered in a simulation. A numerical model is developed and verified, while locally undrained conditions are applied in order to simulate liquefaction. Since mesh distortion becomes excessive, an MMALE-approach is being used.DFG, 341427400, Untersuchung der Rütteldruckverdichtung in Sandböden zur Optimierung der Entwurfs- und Herstellungsqualität hinsichtlich Effektivität, Prognose und Kontrolle der erzielten Bodenverdichtun
