A dynamic analysis of in-situ stress state at the Upper Tamakoshi Hydroelectric Project area, Nepal

  • Krishna Kanta Panthi Norwegian University of Science and Technology
  • Chhatra Bahadur Basnet Norwegian University of Science and Technology
Keywords: In-situ stress, 3D numerical model, Dynamic loading

Abstract

 The in-situ stress condition in the rock mass is influenced by both tectonic and geological environment, such as faulting and shearing in the rock mass. This influence is of considerable magnitude in the Himalayan region where the tectonic movement is active, resulting periodic dynamic earthquakes. Each large-scale earthquake causes both accumulation and sudden release of strain energy instigating changes in the in-situ stress environment in the rock mass. This paper evaluates the influence of local shear fault on the in-situ stress state along the shot crete lined high pressure tunnel of Upper Tamakoshi Hydroelectric Project, 456 MW in Nepal. A detailed assessment of the in-situ stress state is carried out by using both; measured data and three-dimensional numerical analysis using FLAC3D. The analysis includes evaluation on the possible changes in the in-situ stress state in the rock mass caused by seismic activities (dynamic loading).

 

HYDRO Nepal Journal

Journal of Water, Energy and Environment

Issue: 23

Year: 2018

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Author Biographies

Krishna Kanta Panthi, Norwegian University of Science and Technology

Associate Professor

Chhatra Bahadur Basnet, Norwegian University of Science and Technology
PhD research
Published
2018-08-21
How to Cite
Panthi, K., & Basnet, C. (2018). A dynamic analysis of in-situ stress state at the Upper Tamakoshi Hydroelectric Project area, Nepal. Hydro Nepal: Journal of Water, Energy and Environment, 23, 42-47. https://doi.org/10.3126/hn.v23i0.20824
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Articles