ANALYSIS OF A SPILING REINFORCEMENT SYSTEM IN SOFT-GROUND TUNNELING

An investigation of a spiling reinforcement system used for stabilizing tunnels is presented. The system is composed of a series of radially installed reinforcing spiles placed around the perimeter of the tunnel heading before excavation. This system provides immediate stabilization of an opening as well as permanent stabilization. It has been successfully used for tunneling in weak rock formations and, to a lesser extent, in soft grounds. To date, no rational design methodology has been formulated because no reasonable analytic method of analysis has been suggested. A generalized plane strain composite finite-element analysis, which uses the proper simulation of the excavation and reinforcement to calculate three-dimensional stresses and displacements while the finite-element grid remains in two dimensions, is presented. The effects of the reinforcement, the inclination, and the spacing of the spiles on the performance of the system have been analyzed with the proposed method. The ground surface movements are used to calculate the vertical and horizontal distortions that are directly related to damage to buildings located above the tunnel.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1983/945/945-008.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=ANALYSIS+OF+A+SPILING+REINFORCEMENT+SYSTEM+IN+SOFT-GROUND+TUNNELING&author=S.+Bang&publication_year=1983
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Subsurface Soil -Structure Interaction. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Bang, S
• Publication Date: 1983

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 45-51
• Monograph Title: Subgrade moisture: soil properties, foundations, tunnel reinforcement
• Serial:
  • Transportation Research Record
  • Issue Number: 945
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Finite element method; Grouting; Material reinforcement; Reinforcing bars; Rocks; Settlement (Structures); Soft soils; Subsidence (Geology); Tunneling
• Uncontrolled Terms: Rebars
• Old TRIS Terms: Rock tunneling
• Subject Areas: Bridges and other structures; Construction; Geotechnology; Highways; Public Transportation; I42: Soil Mechanics;

Filing Info

• Accession Number: 00389572
• Record Type: Publication
• ISBN: 0309036666
• Files: TRIS, TRB
• Created Date: Oct 30 1984 12:00AM