Rehabilitation of AGL Network for Safety Improvement at NSCBI Airport, Kolkata

Kerf cutting with machine in taxiway/runway/apron/road of PQC/bituminous surface of depth upto 95 mm and width upto 20 mm, using expansion joints / construction joints as far as possible, cleaning, drying, disposing FODs including laying 1 or 2 nos secondary lead/LT cable by wrapping cotton tape, providing polysulphide / asphaltic compound, primar, backer rod ( both top and bottom) etc. complete as required along with arranging water bowser, mobile DG sets etc. whatever necessary to work in a operational airport.

Excavation of earth/soft soil mechanically/manually not exceeding 1.5 mtr in width, and lift upto 1.5mtr, including back filling, dressing, ramming and disposing of excess materials to a lead of 10 KM as required and as directed by the Engineer-In-Charge

Excavation of the trench in hard rock / bituminous / cement concrete of runways/taxiways/ apron/RESA/ Road etc. by power saw cutting without disturbing the other area, upto 1.5 mtr in width, and depth upto 1.0 mtr, including getting out the excavated soil, cleaning the cut area and disposal of excavated debris as directed within a lead of 10 KM including all machineries like power saw, hammer drill / pneumatic drill, water browser, mobile DG set, transportation etc. complete as required.

Providing and laying in position cement concrete 1:2:4 (1 cement : 2 coarse sand : 4 graded stone aggregate 20 mm nominal size) including shuttering, sloping, surface finisfhing for Isolating transformer housing boxes / chambers etc. complete as required as per the site condition and as directed by Engineer-In-Charge.

Supplying and laying of following size UV stabilized, HDPE pipe (PE- 63, PN-6) as per IS - 4984 and IS marked with uptodate amendment along with accessories like socket, bend, couplers etc. complete with fitting, cuttings, jointing etc. below the ground (i/c Road crossing ,Cement concrete Apron Area, Runway, taxiway) at a depth upto 6 m by Horizontal Directional Drilling(HDD) or by Saw Cutting the DRLC / PQC upto required depth, fixing pipe with clamps, providing 100mmX100 mm X 75 mm GI / PVC box at pipe end for fitting wherever applicable and filling the saw cut cement concrete as per the direction of the Civil Department etc. complete as required after doing Ground Penetrating radar survey in case of HDD and submitting its report etc.complete as required. 1 run X 63 mm dia (OD)

Supplying and laying of 63 mm dia (OD-63 mm & ID-51 mm nominal) DWC HDPE pipe ISI marked along with all accessories like socket, bend, couplers etc. conforming to IS 14930, Part II complete with fitting and cutting, jointing etc. in the existing trench, complete as required.

Supply of Iron brackets, feeder pillar legs, angles, coupling, other MS items etc. of various sizes i/c fabrication etc. as per site requirement

Laying of one number PVC/XLPE insulated & PVC sheathed armoured / unarmoured AFL / power cable of voltage grade exceeding 1.1 KV but not exceeding 11 KV of size not exceeding 25 sq. mm. in the existing cable duct / masonry trench / RCC /HUME / METAL / GI / HDPE pipes etc. as required as per standard procedure to achieve higher range IR value of the laid loops.

Laying of one number PVC/XLPE insulated & PVC sheathed armoured / unarmoured AFL / power cable of voltage grade not exceeding 1.1 KV of size not exceeding 25 sq. mm. in the existing cable duct / masonry trench / RCC / HUME / METAL / GI / HDPE pipes etc. as required as per standard procedure to achieve higher range IR value of the laid loops.

Supply and testing of V4+ or latest version Single Channel Addressable Switch Devices, IP-68, directly buried under soil / water for selective switching and monitoring of one lamp in constant current series circuits ( AGL curcuits) comptbile for direct operation with the LED fittings and exitings Honeywell make ILCMS etc. complete as required.