ENGINEERING GEOLOGICAL INVESTIGATIONS IN SOFT ROCK TERRAIN, PORO-O-TARAO TUNNEL, NEW ZEALAND

Construction of tunnels in soft sedimentary rocks and colluvium derived from them can pose problems that are only normally encountered in hard rocks or soils. This was illustrated recently during investigations for the construction of a new 1.3 km, 6 m diameter railway tunnel at Poro-o-tarao. The various investigations undertaken are reviewed, and the effects on construction of the geomechanical characteristics of the materials encountered are described.

Media Info

  • Features: References;
  • Pagination: p. 2.195

Subject/Index Terms

Filing Info

  • Accession Number: 00331549
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 12 1981 12:00AM