SURFACE MOVEMENTS CAUSED BY TUNNELLING IN TWO-LAYER SOIL. ENGINEERING GEOLOGY OF UNDERGROUND MOVEMENTS. PROCEEDINGS OF THE 23RD ANNUAL CONFERENCE OF THE ENGINEERING GROUP OF THE GEOLOGICAL SOCIETY, NOTTINGHAM UNIVERSITY, SEPTEMBER 13-17, 1987

Empirical equations suitably defining surface movements caused by tunnelling in uniform soils are now well-established. Settlements transverse to the tunnel line are usually and conveniently described by a normal probability equation in terms of ground loss, v (m3/m) and of distance to the point of inflection, 1(m). V is dominantly a function of tunnelling method, and i has been expressed explicitly as a function of depth, but dependent upon whether the soil type is granular or cohesive. Little attention, however, has been given to the estimation of ground movements caused by tunnelling through a granular soil overlain by a cohesive stratum, and vice versa. The problem is addressed both by a simple extension to the expressions leading to the normal distribution settlemenmt profile and the consequent transverse inward movements, and also by a linear elastic finite element model. Two well-documented case histories are assessed by the two methods of analysis and both give acceptable estimates of ground movement.(a) for the covering abstract of the conference see IRRD 823385.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0903317419
• Corporate Authors:

  GEOLOGICAL SOCIETY

  BURLINGTON HOUSE, PICCADILLY
  LONDON,   United Kingdom  W1V 0JU
• Authors:
  • SELBY, A R
• Publication Date: 1988

Language

• English

Media Info

• Pagination: p. 71-77
• Serial:
  • Publication of: Geological Society, England
  • Publisher: GEOLOGICAL SOCIETY

Subject/Index Terms

• TRT Terms: Clay; Conferences; Elasticity (Mechanics); Excavation; Excavations; Finite element method; Forecasting; Granular materials; Ground settlement; Linear systems; Mathematical analysis; Mathematical models; Motion; Sand; Soils; Strain (Mechanics); Surfaces; Tunnels
• Subject Areas: Bridges and other structures; Data and Information Technology; Geotechnology;

Filing Info

• Accession Number: 00498581
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 0-903317-41-9
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM