EFFECTS OF INADEQUATE APPLICATION OF PRIMARY SUPPORT MEASURES TO SHALLOW TUNNELS
The aim of this paper is to determine the effects to the design and the final lining of shallow tunnels, resulting from inadequate application of primary support measures. The case presented corresponds to a shallow tunnel penetrating a very poor rock mass. During construction excessive bodily settlements were observed producing a relaxation of the surrounding rock mass. Based on an in-situ examination this was mainly due to the poor foundation of the steel sets. Back-analyses have been carried out, firstly, to verify this assumption, while on a second step the mechanism of weak foundation has been incorporated in the numerical analysis in order to estimate anticipated growth of obtained stresses. Based on the results the support measures of the bench have been adjusted accordingly, while the final lining has also been reinforced to withstand additional loading resulting from the relaxation of the surrounding rock mass.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/3000091696
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Corporate Authors:
Swiss Federal Institute of Technology Zurich
Institute for Geotechnical Engineering
Zurich, Switzerland 8093 -
Authors:
- Comodromos, E M
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Conference:
- Planning and Engineering for the Cities of Tomorrow. Second International Conference on Soil Structure Interaction in Urban Civil Engineering
- Location: Zurich, Switzerland
- Date: 2002-3-7 to 2002-3-8
- Publication Date: 2002
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 241-248
Subject/Index Terms
- TRT Terms: Design; Foundation engineering; Mathematical analysis; Mechanical relaxation; Rock excavation; Settlement (Structures); Stresses; Tunnel lining; Tunnel supports; Vehicular tunnels
- Uncontrolled Terms: Rock mass; Shallow tunnels
- Subject Areas: Construction; Design; Geotechnology; Highways;
Filing Info
- Accession Number: 00930485
- Record Type: Publication
- ISBN: 3000091696
- Files: TRIS
- Created Date: Sep 5 2002 12:00AM