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PHD THESIS
Background
The principle of using unlined high pressure
tunnels is based on the in situ stress condition.
The state-of-the-art in an unlined pressure
tunnel is that the minimum principle stress
should be greater than the internal water
pressure exerted to rock mass from inside the
tunnel. This principle has been widely used in
the Norwegian rock mass condition. The PhD
research is now focused on applicability of this
principle in the Himalayan rock mass condition.
Stress situation in this region is different
from the area of existing unlined pressure
tunnels and hence it becomes necessary
to find a way forward either for the direct
use of existing principle or the modification.
Objective
•
Carryout hydraulic splitting test in the
Himalaya and laboratory test at NTNU
•
Numerical modeling of hydraulic splitting in
order to assess the state-of-the-art unlined
pressure tunnel principle
•
Publish the research results in journals and
conferences, summarize in a PhD thesis
Department of Geo-
science and Petroleum
Spring 2014-2018
Applicability of Unlined/
Shotcrete Lined High
Pressure Tunnels for
Hydropower Projects in
the Himalaya
Supervisor:
Krishna K. Panthi
Chhatra Bahadur Basnet
Hydraulic splitting test arrangement in field
Testing principle.
Test locations.
Test output.
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