GOVERNMENT OF INDIA North Eastern Railway ... - Tenders India

Dy.CSTE/Con/ IZN/02 of 2011 North Eastern Railway
iii) For cable terminations in ASM's office as per Drg. No. Dy.CSTE/ CON /
W – 52 /2005.
iv) For cable jointing pit the cable trench as per Drg. No. CSTE/ CON /
OFC – 18 /2001.
2.13.2 Actual measurement should be made for the length for which special
protection is necessary and the requirement of materials for the protective
works should be worked out. The requirement of materials based on the actual
measurement should be shown in the cable route plan at the appropriate place.
2.14 SPECIAL PROBLEMS OF THE SECTION:
2.14.1 Certain Sections may present special problems such as presence of chemically
active soils, marshy areas, deep cuttings in the rocky areas, requirement of
specially constructed platforms for distribution of cable drums along a high
embankment etc.
2.14.2 Approaches to large bridges may also present special problems due to high
embankment as well as deep ravines.
2.14.3 The survey party should inspect and report to Dy.CSTE/DSTE (whosoever is
in-charge of field unit) such problems at the very outset so that suitable
solutions can be worked out.
2.15 ADDITIONAL MATERIALS REQUIRED FOR PROTECTIVE WORKS FOR OFC
CABLES :- The minimum depth of trenches for OFC cables should be as described
in the scheduleof work. OFC cable must be laid in HDPE pipe (HDPE duct) through
out the route. This will avoid possible breakage of fibre due to vibrations of trains
moving on track. The site engineer will remain present during progress of work, who
will keep a watch on correct laying practice.
2.16 COMMUNICATION ARRANGEMENT IN MAJOR YARDS & STATIONS
In big yard and major stations involving large number of cabins/Depot/Tapping
points, it may not be practicable to lay independent derivation cables for various
locations. Therefore one main cable shall be laid to transverse in a zigzag way through
the yard involving frequent tapping points. Lead sheath derivation., 6 quad or higher
size PIJF cable may be laid for this purpose. The circuits should preferably be tapped
through V.F. transformers.
2.16.1 The typical layout of OFC hut is given in Drg. No. Dy.CSTE/Con/East/12.2001 (MW).
2.16.2 There should be sufficient area available near the building for installation of earthing
system. In certain locations this may require large area so as to achieve low resistance
of earthing for which an electrode grid consisting of 30 or 40 rods with 5.0 meter
spacing is to be installed or a large ring of earthing will have to be buried.
2.16.3 Preference should be given for housing OFC cable hut in existing Microwave
Repeaters, Telephone building etc.
2.16.4 Selection of site for cable hut, route survey as well as laying of cables shall be
in consultation with site engineer.
Signature of Tenderer(s)
Date…………………
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