Various investigations have been and are being carried out on the coupled thermo-hydro-mechanical behaviour of Boom clay in relation with the research conducted on radioactive waste disposal at the Mol Underground Research Laboratory (URL). This URL has been excavated in a layer of Boom clay at a depth of 223 m by SCK-CEN, the Belgian organisation for nuclear studies, near the city of Mol. Various researches on Boom clay are presently being carried out by the EURIDICE group in Mol.