THE USE OF SUPER COMPUTERS FOR PREDICTING THREE-DIMENSIONAL GROUND DEFORMATIONS DUE TO TUNNELLING IN SOFT SOILS. NUMERICAL MODELS IN GEOMECHANICS. NUMOG III. PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM HELD IN NIAGARA FALLS, CANADA, 8-11 MAY 1989

This article describes the use of superconductors for estimating surface settlements caused by tunnelling in soft ground. A three dimensional elasto plastic finite element formulation has been developed to allow simulation of the construction patterns around the tunnel face and at the ground surface. This formulation gives rise to a large number of non linear equations, and the solutions as to which require substantial amounts of memory and processing time. This paper describes some of the issues associated with the implementation of this finite element procedure on both a cray x-mp and an eta 10-p supercomputer. The numerical procedure, solution scheme, stiffness matrix storage and equation solver are all discussed. It is noted that the blocked "profile" solution scheme can be an effective means for solving large systems of equations. However the choice of solution technique will involve consideration of the interdependence between the numerical methodology and the algorithm in relation to the actual processor design and configuration, and the optimal procedure on one supercomputer may not be optimal on another supercomputer. For the covering abstract of the conference see IRRD 824029.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/1851664254
• Corporate Authors:

  Elsevier Science Publishers

  Crown House, Linton Road
  Barking, Essex IG11 8JU,   England 
• Authors:
  • Lee, K M
  • Rowe, R K
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 481-8
• Serial:
  • Publication of: Elsevier Applied Science Publishers Limited
  • Publisher: Elsevier Science Publishers

Subject/Index Terms

• TRT Terms: Computer programs; Conferences; Digital computers; Excavation; Excavations; Finite element method; Forecasting; Ground settlement; Mathematical models; Nonlinear systems; Optimization; Soft soils; Stiffness; Tunnels
• Uncontrolled Terms: Optimum
• Subject Areas: Bridges and other structures; Data and Information Technology; Geotechnology;

Filing Info

• Accession Number: 00497955
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 1-85166-425-4
• Files: ITRD, TRIS
• Created Date: Sep 30 1990 12:00AM