Successful tunneling through a very weak conglomerate

A. Shafiei, M. B. Dusseault, H. Rahdar, S. Mesgarzadeh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This article highlights the geotechnical challenges faced during design and construction of Lot No. 6 of the Dez-Qomroud water transfer tunnel project in Iran. The main stratum along the tunnel path is a mud-supported weak conglomerate. Results from comprehensive rock mass characterization using different rock mass classification systems revealed that because of very weak strength properties of the conglomerate some tunnel sections will be stable for not more than ten hours. Some engineering geological considerations made to guarantee a safe construction of the tunnel such as reducing the tunnel diameter and relocating the tunnel route to avoid saturated ground. Implementing results from this study led to successful completion of the project.

Original languageEnglish
Title of host publicationISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008
EditorsAbbas Mahdi, Abdolhadi Ghazvinian
PublisherInternational Society for Rock Mechanics
Pages835-844
Number of pages10
ISBN (Print)9781617823527
Publication statusPublished - Jan 1 2008
Externally publishedYes
Event5th Asian Rock Mechanics Symposium 2008, ARMS 2008 - Tehran, Iran, Islamic Republic of
Duration: Nov 24 2008Nov 26 2008

Publication series

NameISRM International Symposium - 5th Asian Rock Mechanics Symposium 2008, ARMS 2008

Conference

Conference5th Asian Rock Mechanics Symposium 2008, ARMS 2008
CountryIran, Islamic Republic of
CityTehran
Period11/24/0811/26/08

Keywords

  • Collapse
  • Iran
  • Mitigation Measure
  • Qomroud Tunnel
  • Tunneling

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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