v. 1. section 1. Underground city design, planning of underground constructions ; section 2. Geotechnical survey and improvement of ground mass ; section 3. Research, development and design of underground constructions in built-up areas -- v. 2. section 4. Urban tunnelling and its monitoring : conventional and mechanized tunnelling ; section 5. Underground constructions executed from surface in built-up areas ; section 6. Concrete in underground construction ; section 7. Distribution and management of risks and accidents during tunnelling -- v. 3. section 8. Tunnel equipment : fire and operational safety ; section 9. Historical underground constructions; maintenance and reconstruction of underground constructions.