CIRCULAR TUNNEL IN REINFORCED JOINTED ROCK MASS. NUMERICAL MODELS IN GEOMECHANICS. NUMOG III. PROCEEDINGS OF THE 3RD INTERNATIONAL SYMPOSIUM HELD IN NIAGARA FALLS, CANADA, 8-11 MAY 1989

This paper describes an equivalent material modelling technique which simulates the behaviour of a jointed rock mass. Passive fully grouted rock reinforcement is also incorporated in the material model. A deep circular tunnel in a rock mass having one set of joints is analysed using this model. The effect of spacing of joints and reinforcements on deformations and stresses in the surrounding rock mass and reinforcements are examined. The results of the analysis show that the spacing of the joint set and the passive reinforcement have a considerable influence on the rock mass around the tunnel opening. The rock mass behaves as an anisotropic material. With increased deformation occurring in the direction normal to the joints. An increase in joint spacing decreases this anisotropic behaviour. Provision of passive reinforcement has a pronounced effect on the displacements, but only a marginal effect on the stresses induced in the rock mass. The axial stress in the reinforcement decreases considerably with an increase of spacing between joints. For the covering abstract of this conference see IRRD 824029.

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• Corporate Authors:

  Elsevier Science Publishers

  Crown House, Linton Road
  Barking, Essex IG11 8JU,   England 
• Authors:
  • Sharma, K G
  • Varadarajan, A
  • Pandya, A B
• Publication Date: 1989

Language

• English

Media Info

• Pagination: p. 524-35
• Serial:
  • Publication of: Elsevier Applied Science Publishers Limited
  • Publisher: Elsevier Science Publishers

Subject/Index Terms

• TRT Terms: Conferences; Deformation; Design; Elasticity (Mechanics); Finite element method; Grout; Joints; Material reinforcement; Mathematical models; Plasticity; Reinforcing materials; Rock mechanics; Stresses; Tunnels
• Subject Areas: Bridges and other structures; Design;

Filing Info

• Accession Number: 00497960
• 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