Tender for Optical Fibre Cable Protection works in - Northern ...

DGMM-KP/Protective work/Tender-08(II)/2012-13
After pulling of the drum is completed, both ends of the HDPE/PLB pipe in each
manhole should be sealed by hard rodent resistant rubber bush, to avoid entry of
rodents/mud into HDPE/PLB pipes.
The Manholes are prepared by providing 65mm split HDPE/PLB pipe of 2.5 to 3m
length and closing the split HDPE/PLB pipes by providing necessary clamps/
adhesive tape as per the directions of Engineer-in- charge. Afterwards, the split/cut
HDPE/PLB pipe are covered with 100 mm split RCC pipe of 2m length and sealing
the ends of RCC pipe with lean cement solution for protecting bare cable in the
manhole . After fixing of HDPE/RCC Split Pipes necessary back
filling/reinstatement and dressing of manholes should be carried out as referred
under trenching. The location of the pulling manhole should be recorded for
preparation of documentation.
5.3 Jointing/ Splicing :
The OFC cable drums are usually of 2 km in length hence optical fibre joints will be
approx. at every 2 Kms. The 6/12/24 fibers are to be spliced at every 2 km & at
both ends (Terminations) in the equipment room as directed by the Engineer-incharge.
The Infrastructure required for cable splicing is
Splicing machine
Air Conditioned Van
OTDR
Optical talk set
Tool kit etc.
Will be arranged by the bidder at his own cost and also any additional accessories.
e.g. engine etc. required at site for splicing will also be arranged by the bidder at
his own cost.
The optical fibre cable thus jointed end-to-end will be tested by an officer of A/T
unit for splice losses and transmission parameters as specified by TCHQ and
prevalent at that time. The OF cable should meet all the parameters, specified and
no relaxation will be granted.
It should also be ensured that during jointing no fibers are interchanged or broken.
The number of joints should not be more than 10 % of the theoretical value
calculated by the department.
Note 1: The jointing/splicing of optical fibre cable is an optional item. The BSNL
units which are equipped for this works should preferably carry out this
work departmentally.
6) Construction of Jointing Chamber :
The joint chambers are provided at every joint to keep the O.F.C. joint well
protected and also to keep extra length of cable, which may be, required to attend
the faults at a later date. Jointing chambers are to be prepared normally at a
distance of every 2 km. Actual location of jointing chamber depends on length of
cable drum and appropriateness of location for carrying out jointing work. The
location is finalized by Engineer-in-charge. The jointing chambers are constructed
either of brick masonry work at site & pre cast RCC slabs for covers or by way of
78 Signature of Bidder with seal