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Construction of headrace tunnel of Vishnugad-Pipalkoti HE Project (444MW) in extreme geological conditions: Issues and challenges-A case study
Published in CRC Press/Balkema
Pages: 2005 - 2012
Vishnugad-Pipalkoti HE Project(444MW) is under construction on Ala-knanda River in Distt Chamoli, in the state of Uttarakhand. This Project will generate 444 MW Power by installing four turbines of 111MW each. The central feature of this project is its 13.5Km long headrace tunnel with an 8.8 m finished diameter. Out of its 13.5 km length,12.3 km is to be bored by using a double-shield TBM of 9.86 m diameter and the remaining 1.2 km to be bored with the help of DBM. The present authors want to highlight the issues and challenges faced during transportation and installation of the TBM and the universal geological surprises faced by the working team after starting the boring and the remedial measures adopted, therefore. The paper also discusses the analysis and design of the large-sized adit bored in the extremely poor rock conditions and the innovative measures undertaken for its construction. © 2023 The Author(s).
About the journal
JournalExpanding Underground - Knowledge and Passion to Make a Positive Impact on the World- Proceedings of the ITA-AITES World Tunnel Congress, WTC 2023
PublisherCRC Press/Balkema