This article reports progress on the naples underground public transport system currently under construction between garibaldi and secondigliano. The 16.5 km line, part tunnel, part elevated track, rises 235 m from start to finish and the design by metropolitana milanese, includes a large spiral track section where gradients are up to 5.5%. The hill through which the tunnels are to be driven consists of welded ash or tuff, overlying coarse sand-size, poorly cemented granular pumice deposits. The project is funded by the city of naples, the Italian government and the European community. Metrosud is one of 3 joint ventures working on the project; two of their projects are detailed: a) an experimental section was begun in 1986 and is now complete. This consisted of a free standing, 5 m dry tunnel excavated in hard tuff, with steel ring lining and reinforced spray concreting; b) metrosud have a second stage nearing completion and are preparing the third stage which includes 1800 m through loose pyroclastic deposits; this is expected to take 5 years. The final section, near the coast, may not be financed until 1995 or later: surface groundwater and loose pyroclastic deposits will dictate the use of a slurry tunneller on an earth pressure balance machine. Cooperative ventures are likely.

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • -
  • Publication Date: 1989-9


  • English

Media Info

  • Pagination: p. 34-5
  • Serial:
    • Volume: 22
    • Issue Number: 6
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00497881
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Sep 30 1990 12:00AM