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| URI
H.E.P. - KASHMIR, INDIA |
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INSTALLATION
Installation of the penstocks presented many problems
due to the underground conditions particularly the
ingress of the water within the vertical shafts.
In order to minimise civil excavation works in the
Access gallery and associated tunnels, a system
of rotating the penstock sections within their own
envelope was developed utilising a turning frame
complete with trunnions. A specialised hoisting
system was designed to allow the use of a single
winch to service both vertical shafts.
Two purpose built welding platforms were fabricated
for use within the penstocks with access being gained
from the manriding winches.
A further challenge on the project was the installation
of the lobsterback sections at the base of the vertical
shafts.
Several methods were evaluated using computer graphics
with the final system proving very succesful.
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SPECIAL CONSIDERATIONS
| TRANSPORT |
To get the project underway some 6,000
tonnes of steel, plant and equipment
made the journey of over 2,000 miles
by road from Bombay to URI in the foothills
of the Himalayas. Delays due to weather
conditions and landslides were frequent
and it was necesary to anticipate well
in advance, the site's requirements
for materials and supplies.
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| RECRUITMENT |
Skilled craftsmen were recruited
directly by Whessoe in a recruiting
campaign across India. Further
training was given on site to
ensure that high quality fabrication
and welding standards were achieved.
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| CIVIL
UNREST |
As it was not possible to transport
pre-fabricated sections to the
site location, a fabrication facility
was erected on site adjacent to
the installation adit on ground
built up using tunnel spoil. Foundations
were laid and a large fabrication
shop was erected.
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URI Hydro-Electric Project in
Kashmir for National Hydro Power
Corporation/Kvaerner Boving. 5m
diameter steel tunnel lining of
vertical shafts and high pressure
tunnel with associated bifurcation. |
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