Stability Challenges and Remedial Practices in Himalayan Hydro-power Tunnels – A Review

Authors

  • Tek Bahadur Katuwal NTNU, Norway and Pashchimanchal Campus (WRC), Institute of Engineering (IoE), Nepal
  • Krishna Kanta Panthi Pashchimanchal Campus (WRC), Institute of Engineering (IoE), Nepal

DOI:

https://doi.org/10.3126/jes2.v3i1.66229

Keywords:

Geological Anomalies, Himalayas, Stability, Stress Anisotropy, Tunnelling

Abstract

The instability in tunnels is mainly affected by geological anomalies, rock mass quality, complex geological structures, active tectonics, and stress anisotropy. This review article presents challenges associated with stability and applied remedial measures prevailing in hydropower tunnels in the Himalayas. The review covers nine hydropower tunnels located in different parts of the Himalayas. The review found that rock bursting/spalling frequently occurs when the tunnel passes through a high overburden with good rock mass quality. On the other hand, plastic deformation (squeezing) occurs when a tunnel passes through the weak and schistose rock mass. It has been found through the review that the tunnel crew was able to successfully solve instability challenges. Effective planning, design, and selection of appropriate construction techniques help to complete tunneling projects in the Himalayas.

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Author Biographies

Tek Bahadur Katuwal, NTNU, Norway and Pashchimanchal Campus (WRC), Institute of Engineering (IoE), Nepal

Assistant Professor

Krishna Kanta Panthi, Pashchimanchal Campus (WRC), Institute of Engineering (IoE), Nepal

Professor

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Published

2024-06-04

How to Cite

Katuwal, T. B., & Panthi, K. K. (2024). Stability Challenges and Remedial Practices in Himalayan Hydro-power Tunnels – A Review. Journal of Engineering and Sciences, 3(1), 9–19. https://doi.org/10.3126/jes2.v3i1.66229

Issue

Section

Review Articles