DEFORMATION BEHAVIOUR OF THE TUNNEL UNDER THE EXCAVATION OF CROSSING TUNNEL. PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON NUMERICAL METHODS IN GEOMECHANICS, 11-15 APRIL 1988, INNSBRUCK, AUSTRIA. VOLUMES 1 - 3

The influence on an existing main tunnel when a new access tunnel is excavated to cross obliquely by the angle 45 degrees to the existing tunnel is analysed using a 3-dimensional finite element analysis of the face progression during excavation. Two types of excavation patterns are examined. The access tunnel is excavated both from and to the main tunnel. It is found that the influence area along the main tunnel is about the size of the tunnel diameter in the obtuse angle side, and about 3 times to the tunnel diameter in the acute angle side from the point of intersection. The change in displacement begins to appear as the excavation progresses towards the main tunnel. It disappears as the excavation face gets a distance of 2-3 times the tunnel diameter from the tunnel intersection. (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:
  • Tsuchiyama, S
  • Hayakawa, M
  • Shinokawa, T
  • KONNO, H
• Publication Date: 1988

Media Info

• Features: References;
• Pagination: p. 1591-96
• Serial:
  • Publication of: Balkema (AA)
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Conferences; Dislocation (Geology); Excavation; Finite element method; Intersections; Mathematical models; Tunnels
• Uncontrolled Terms: Two
• ITRD Terms: 8525: Conference; 5155: Excavation (process); 6490: Finite element method; 455: Junction; 6473: Mathematical model; 5483: Movement; 9080: Three dimensional; 3374: Tunnel; 9082: Two
• Subject Areas: Bridges and other structures; Construction; Highways;

Filing Info

• Accession Number: 00492684
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-6191-809-X
• Files: ITRD, TRIS
• Created Date: Mar 31 1990 12:00AM