INFLUENCE OF THE HEADING FACE AND A TWO-DIMENSIONAL CALCULATION MODEL OF TUNNEL LININGS. PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN GEOMECHANICS, 11-15 APRIL 1988, INNSBRUCK, AUSTRIA. VOLUMES 1 - 3

This paper describes a two-dimensional model based on the finite element method (fem) which calculates the stresses in tunnel linings, taking the influence of the heading face into account. The model is a "stiffness reduction model". It presents the stiffness of the body excavated from the rock massif (the tunnel) as a function that decreases with time. The realization of the preliminary elastic deformation in the area of the heading face is imitated by reducing the value of Young's modulus of the excavated body (tunnel). In order to calculate this lowered value, only Young's modulus and Poisson's ratios of the rock massif need to be known. Some graphs and a formula have been obtained for the practical application of the model. A comparison has been made with the three-dimensional fem analysis. (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/906191809X
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000
• Authors:
  • Vassilev, V H
  • Hristov, T N
• Publication Date: 1988

Media Info

• Features: References;
• Pagination: p. 1551-55
• Serial:
  • Publication of: Balkema (AA)
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Conferences; Evaluation; Finite element method; Mathematical models; Modulus of elasticity; Poisson distributions; Poisson ratio; Stiffness; Stresses; Tunnel lining
• Uncontrolled Terms: Two dimensional
• ITRD Terms: 8525: Conference; 9020: Evaluation (assessment); 6490: Finite element method; 6473: Mathematical model; 5919: Modulus of elasticity; 5924: Poisson's ratio; 5931: Stiffness; 5575: Stress (in material); 3385: Tunnel lining; 9083: Two dimensional
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00492678
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-6191-809-X
• Files: ITRD, TRIS
• Created Date: Mar 31 1990 12:00AM