CONSOLIDATION ASSOCIATED WITH SHIELD TUNNELLING

This final project report describes an investigation carried out at the Geotechnical Division of the Faculty of Civil Engineering of the Delft University of Technology. The importance of the consolidation of soft soils around tunnels constructed by means of a mechanized shield was investigated. The SUBSIDEN computer program and the PLAXIS finite element program were used to investigate the influence of several parameters on the displacements of the soil and the forces in the tunnel lining for a tunnel in a homogeneous soil. These parameters included e.g. the permeability of the soil and the rate of water flowing into the tunnel. Five basic soil types were chosen: (1) medium stiff clay; (2) peat; (3) soft clay; (4) very soft clay; and (5) stiff clay. For unfavourable soil conditions the dissipation of excess pore pressures generated during the construction phase may cause a major increase in the settlements above shield tunnels in course of time. The generation of overpressures locally leads to an outflow of water, which causes settlements, while underpressures lead to an inflow of water and heave of the soil.

  • Corporate Authors:

    TECHNISCHE UNIVERSITEIT DELFT, FACULTEIT DER CIVIELE TECHNIEK

    STEVINWEG 1
    DELFT,   Netherlands  2628 CN
  • Authors:
    • KOELEWIJN, A R
  • Publication Date: 1994-11

Language

  • English

Media Info

  • Features: References;
  • Pagination: 134 p.
  • Serial:
    • GEOTECHNICAL REPORT
    • Issue Number: 376
    • Publisher: TECHNISCHE UNIVERSITEIT DELFT, FACULTEIT DER CIVIELE TECHNIEK

Subject/Index Terms

Filing Info

  • Accession Number: 00714299
  • Record Type: Publication
  • Source Agency: DIENST WEG- EN WATERBOUWKUNDE (DWW)
  • Files: ITRD
  • Created Date: Dec 27 1995 12:00AM