A RATIONAL APPROACH TO THE ANALYSIS OF CONSTRUCTION FILLING OR EXCAVATION. NUMERICAL MODELS IN GEOMECHANICS. NUMOG III. PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM HELD AT NIAGARA FALLS, CANADA, 8-11 MAY 1989

The stress, strain and pore pressure developments in geomechanical structures where the geometry of the domain changes with time (embankment dams, tunnels, earthfills,...) has always been of great interest to engineers. The classical analysis of the construction process by the finite element method consists in dividing the problem into several time steps, each coinciding with the addition or removal of one layer which is then modelled by a number of elements. The mesh size and the number of time steps play an important role in the analysis noting that in reality the height of one layer exceeds rarely 60 centimeters the simulation of which would be far too costly. The soil behaviour depends on the history of construction so one should emulate the process of construction as correctly as possible, with the necessity of using a fine mesh and a large number of time steps which is not usually done being limited by the means of computation. To overcome these problems a new formulation is proposed. This formulation is based on the laying of infinitesimal layers, in a domain parametrized by the time variable. The equilibrium and the mass conservation equations and their variational formulations are presented and these are then transformed into equations in the reference configuration. The latter are discretized in space and time in order to be integrated in a finite element code. Finally, the numerical method of resolution of the resulting non linear problem is discussed. For the covering abstract of this 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:
  • Aubry, D
  • MODARESSI, A
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 455-62
• Serial:
  • Publication of: Elsevier Applied Science Publishers Limited
  • Publisher: Elsevier Science Publishers

Subject/Index Terms

• TRT Terms: Conferences; Earthwork; Finite element method; Hydraulic fluids; Hydraulics; Mathematical models; Motion; Nonlinear systems; Pavement layers; Pore water pressures; Porosity; Slope stability; Soil mechanics; Stresses; Time
• Subject Areas: Data and Information Technology; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00497952
• 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