To investigate the time-dependent load-deformation behaviour of foundations under alternating loads in overconsoli-dated clay, centrifuge tests on rafts and piled rafts in Kaolin clay are carried out. The foundations are subjected to unloading and reloading processes as well as to groundwater lowering, simulating typical loading scenarios of structures in an urban environment. In the scope of this paper initial results are presented and are discussed in the light of previous research on the distribution of pile resistances within piled rafts and the influence of the consolidation process.