Engineering geological problems along the qomroud long tunnel lot no.1 in iran

A. Shafiei, M. B. Dusseault, F. F. Sani, M. Sotoudeh

Research output: Contribution to conferencePaperpeer-review

1 Citation (Scopus)

Abstract

The Qomroud Long Tunnel lot number 1 (QLT1), a 10.4 km tunnel, is under construction as part of the Dez to Qomroud water conveyance tunnel projects (total length 55 km) in west central Iran, Lorestan province. The project involves four tunnels, three small dams and a large dam. The longest tunnel in the Dez to Qomroud projects is known as Qomroud Long Tunnel (QLT) with length of nearly 36 km. QLT1, the subject of this study, was defined as the first 10.40 kilometers of the QLT. Construction of QLT1 stopped in June 2000 after severe stability problems because of the nature of geological strata along the tunnel. Additional engineering geological investigations were commissioned. In this article, we highlight engineering geological problems along the QLT1 tunnel route such as water inrush, water jet potential in meta-dolomite, tunneling in fault and crushed zones, potential for high water pressures, raveling, swelling and saturated material flow in alluvial sections, and ground squeezing in weak rocks. Als , some geotechnical design considerations are proposed as special measures to consider in design and implementation of a new construction method in this difficult ground condition.

Original languageEnglish
Publication statusPublished - Dec 1 2008
Externally publishedYes
Event42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008 - San Francisco, CA, United States
Duration: Jun 29 2008Jul 2 2008

Conference

Conference42nd U.S. Rock Mechanics - 2nd U.S.-Canada Rock Mechanics Symposium 2008
CountryUnited States
CitySan Francisco, CA
Period6/29/087/2/08

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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