ABTUS-BVOTS has set its aim as to promote the knowledge about the study and the realisation of underground works of all kind: transport tunnels (road, metro and rail), sewers and technical galleries, shopping centres, car parks and underground factories, main underground structures as power and storing plants, etc. Its interest goes thus to all sectors of science and technique linked with problems as stability of underground works, construction techniques, organisation of underground works, specific material for these works, classical and spatial townplanning, knowledge of the environment, juridical and administrative aspects, economical and social questions, etc. ABTUS - Association Belge des Techniques et de l’Urbanisme Souterrains - ABSL. BVOTS - Belgische Vereniging voor Ondergrondse Technieken en Stedenbouw - VZW. Member of ITA-AITES: ITA - International Tunnelling and Underground Space Association. AITES - Association Internationale des Tunnels et de l'Espace Souterrain. Member of EUTF: EUTF - European Underground & Tunnel Forum