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

Dy.CSTE/Con/ IZN/02 of 2011 North Eastern Railway
measurement should be made where necessary. In case of special terrains, the
separation distance at some points on the route may also have to be reckoned
from some other permanent structures depending upon the site conditions.
2.7.8 The separation distance of the cable route from the nearest track on the
"straight runs" should be 10M The deviating from this standard separation of
10M should be kept to the minimum and as soon as any obstruction has been
negotiated, the route should again follow this standard separation distance. It is
desirable from the point of view of calculating the induced voltage that the
uniformity of the separation is maintained for the maximum possible length of
the main cable route.
2.7.9 Separation distance should be marked on the "straight runs" portion of the
cable route plan (5 Km. chart) at intervals of not more than 250 M In addition,
the separation distance at points of change in the cable route such as
diversions, track crossings, approaches to bridges, culverts, etc. should
invariably be marked on the cable route plan in such a way as the intended
cable route is clearly defined for "special terrain" the separation distance
should be marked at as close intervals as is considered necessary depending on
the site conditions.
2.7.10 The route should be decided by walking along the track. On long stretches
"straight runs" a push trolley moving slowly may be used . The trolley should
be on the track closes to the proposed route.
2.7.11 Actual measurement should be made for the protective works required for the
cable passing over the culverts, under tracks, over long girder bridges, level
crossings, rocky areas, under the bed of culverts etc.
2.7.12 Once the cables are laid, the actual length of cable as per the printed marking
on the cable is required to be indicated at every kilometer of cable route, at
diversions, crossings, approaches of bridges and joints for optical & quad
cables.
2.8 FINALISATION OF TAPPING DIAGRAM
2.8.1 The survey team should visit each location such as cabin, SM's offices, Loco
sheds, cabins, gate lodges, etc. and verify the details collected during the
preliminary survey of all the existing telecommunication facilities, and
additional telecommunication facilities to be provided.
2.8.2 The position of each tapping should thus be finalized and a final tapping
diagram prepared.
2.9 ISOLATED TELEPHONE CIRCUITS
It is necessary that all the telephone circuits such as isolated quarry sites, gate lodges,
etc. are taken note of and provision made for transferring the overhead alignment into
cables wherever considered necessary.
2.1 LENGTH OF OFC/6 QUAD CABLE
The cable length is worked out on following basis to arrive at the locations of the
straight joints:-
a) Route length as per actual measurement plus contour allowances of 3.5%.
Signature of Tenderer(s)
Date…………………
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