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Engineering geological evaluation of the Of-Solakli hydropower development project (N.E. Turkey)

  • V. Doyuran
  • V. Toprak
  • T. Topal
  • A. Koçyīĝīt
  • F. B. Rojay
  • E. Bozkurt
Article

Abstract

The Of-Solakli Hydropower Development Project (HDP) is designed to generate 380 MW of electricity through the diversion of six streams into a headrace tunnel and maintaining a head difference of 1 000 m above the underground power station. The tunnel system is located within felsic and mafic magmatic rocks, and volcanogenic flysch.

In this paper an engineering geological evaluation of the HDP is introduced. The field investigations included geological strip mapping, core drilling, and intense discontinuity surveying. A portion of the headrace tunnel was re-located due to adverse foundation conditions. The rock mass qualities of various lithological units were determined and the necessary support systems are described.

Keywords

Shear Zone Felsic Rock Rock Mass Quality Contour Diagram Diversion Tunnel 

Évaluation géotechnique du projet de centrale hydroélectrique d’of-solakli (N.E. Turquie)

Résumé

Le projet de construction d’une centrale hydraulique à Of-Solakli a pour objectif de produire 380 MW d’électricité par la diversion de six cours d’eau dans un tunnel principal en conservant une différence de charge hydraulique de 1000 m au-dessus de la station souterraine. Le système de tunnels se situe dans des roches magmatiques felsitiques et mafiques et dans un flysch d’origine volcanique.

Cet article présente une évaluation géotechnique du projet. Les investigations sur le terrain inluent la préparation d’une carte géologique, des carottages, et un levé détaillé des discontinuités. Une partie du tunnel principal a été relocalisée en raison de mauvaises conditions de fondation. Les caractéristiques qualitatives des différentes unités lithologiques sont déterminées et les systèmes de support nécessaires sont décrits.

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Copyright information

© International Association of Engineering Geology 1993

Authors and Affiliations

  • V. Doyuran
    • 1
  • V. Toprak
    • 1
  • T. Topal
    • 1
  • A. Koçyīĝīt
    • 1
  • F. B. Rojay
    • 1
  • E. Bozkurt
    • 1
  1. 1.Geological Engineering DepartmentMiddle East Technical UniversityAnkaraTurkey

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