Shri
Mallikarjun Kharge, Hon’ble Minister for Railways, will lay the foundation stone for
construction of a 1.5 Km long Tunnel at Margutti on Bidar-Gulbarga new rail
line at 11:00 hrs on 28thOctober, 2013 at a function to be
held at Margutti Cross, Gulbarga District.
Other
Hon’blePublic Representatives, dignitaries and senior Railway officials will
also participate in the function.
Theworks on
Bidar-Gulbarga new railway line are rapidly progressing.The laying of
foundation stone for construction ofa Tunnel at Margutti marks a step forward
in the new line work. once completed, the Bidar-Gulbarga new railway line will
fulfil the long cherished aspirations of the people of Bidar and Gulbarga
Districts to have direct rail connection between these two prominentand
historic cities of north Karnataka.
A)Salient
Features of the Railway Tunnel at Margutti on Bidar-Gulbarga new
Railway Line:
South Central
Railway is executing the 110 km. Bidar-Gulbarga new railway line Project. Works
on this new Railway line are progressing at a faster pace. As a
part of this new line work, construction of a Tunnel is to be taken up at
Margutti at an estimated cost of Rs.60 cr. The Salient Features of the Tunnel
wok are as under:-
Ø The length
of this ‘D’ shaped tunnel will be 1.5 Km. and the width
will be 4.925m . The Tunnel will have sufficient height to have electrified
traction on the section in future as per need. Twenty five metre long
concrete portals (entry frames) will be provided on either end of the
Tunnel.
Ø Necessary
Geotechnical investigations (soil and rock testing) have been carried out by
drilling nine bore holes up to a maximum depth of 45m. and ensured that no
water table was encountered.
Ø Wenner
configuration of electrical resistivity method was used to determine soil
moisture levels, stratification and discontinuities in soil mass. The crown of
the tunnel consists of fresh / jointed basalt.
Ø Design of the
Tunnel has been carried out based on Finite Element Analysis (FEA).
Siesmo-tectonic maps of the Tunnel site, provided by Geological Survey of
India, Hyderabad, have been verified and ensured that no folds and faults are
found in the site. Further, the design of the tunnel was also proof-checked by
Indian Institute of Technology, Mumbai.
Ø Central Institute
of Mining & Fuel Research (CIMFR), Regional Centre, Nagpur is requested to
provide necessary technical support for the blasting pattern design in order to
avoid over-breakage or damage to the parent rock while carrying out blasting
operations for excavating the Tunnel.
Ø This Tunnel
will have ballastless track, Plum concrete at formation level and Pipe-ducts
for Signal / Telecommunication / Electrical Cables.
Ø Drainage
arrangements will be provided with 1 in 200 gradient inside the tunnel with
adequate capacity to clear the flood water across tunnel during rains to
prevent water ingress and stagnation in the tunnel.
Ø Trolley
Refuges will be provided at every 100m of the Tunnel for the safety of
the inspecting officials and track maintaining staff. Covered side drains will
act as foot path.
Ø The Tunnel
work is targeted to be completed with in a period of 18 months.
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