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  1. HydroCen Research Hydropower structures
  2. 1.1 Hydropower tunnels, penstocks and surge chambers
  3. Long term impact on unlined tunnels

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Long term impact on unlined tunnels

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  • Hydropower structures
    • 1.1 Hydropower tunnels, penstocks and surge chambers
      • Long term impact on unlined tunnels
      • Swelling rocks and hydropower tunnels
      • Test methods and design of transition zones
      • Tunnel improvements for pump storage
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    • 1.4 Fish friendly intakes
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Tunnel robustness in start-stop power production

Tunnel robustness in start-stop power production

Tunnel robustness in start-stop power production

In the future, most countries in Europe will be switching to renewable energy. In this context, water reservoirs in Norway are sought to be used as a «battery» for the European power grid.

Bibek Neupane discussing measuring equipment with supervisor Krishna Panthi at Roskrepp Power plant. Photo: Juliet Landrø

Hence, the motivation of this research comes from the fact that unlined tunnels, which have been designed and constructed for base load plants, are now operating under dynamic loading conditions in terms of water pressure since the power market deregulation in 1991. 

This will further be increased with increasing market demands. This research aims to focus on the effect of such dynamic pressure changes on Norwegian hydropower tunnels.

Objectives

  • Understand the effect of water pressure fluctuations in the rockmass and the tunnel.
  • Identification of the mechanics of failure and engineering geological factors triggering failure tooccur in the tunnel.
  • Analyze the functionality of the rock mass along the periphery of the tunnel alignment in the long term.
  • Investigate state-of-art safe design of unlined tunnels, which can cope with the load fluctuations resulting due to the peaking operations and catering to the need of long term durability

Contact

Contact

Bibek Neupane

Bibek Neupane

PhD

E-mail: bibek.neupane@ntnu.no

Supervisor: 

Krishna Panthi, NTNU

About the Project

About the Project

WP 1.1.4


Full project title: Long-term impact on unlined tunnels of hydropower projects due to frequent start stop sequences

Duration: 2017-2021

R&D Partners: 

NTNU – Norges teknisk-naturvitenskapelige universitet

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