Resurfacing of Runway at Coimbatore Airport

Amount

Dismantling of flexible pavement (bituminous courses) by mechanical means and disposal of dismantled material within Airport Premises as per direction of Engin eer-in- charge.

Demolishing cement concrete manually/ by mechanical means including disposal of materialWithin Airport Premises as per direction of Engineer - in - charge.: Cement Concrete In Pavement Section Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

Hacking and removing of existing paint marking complete as per direction of the Engineer-in-Charge.

Preparation of granular sub-base by providing close graded material, conforming to specifications mixing in a mechanical mix plant at OMC, carriage of mixed material by mechanical transport to work site, for all leads and lifts, spreading in uniform layers of specified thickness with mechanical means including neatly leveling & dressing on prepared surface and compacting with vibratory power roller to achieve the desired density, complete and as per direction of Engineer-in-charge.

Providing, laying, spreading and compacting graded stone aggregate (size range 53 mm to 0.075mm) to wet mix macadam(WMM) specification including premixing the material with water at OMC in mechanical mix plant, carriage of mixed material by mechanical transport to site, for all leads & lifts, laying in uniform layers with mechanical paver finisher in sub-base/ base course on well prepared surface and compacting with vibratory roller of 8 to 10 tonne capacity to achieve the desired density, complete as per specifications and directions of Engineer-in-charge

Providing and laying of Hot Mix Dense Bituminous Macadam (DBM) using crushed stone aggregate of quality, size and grading as specified and cement filler of quality as specific and Viscosity Grade Bitumen(Supplied in bulk) in proportions as per job mix formula and laid to specific levels, grade and camber as per specification, drawings and as directed by the Engineer-in-Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values of compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade*( VG-30)shall be taken as 110Kg/m3 of mix supplied in bulk produced by Govt. Refineries and 2% cement by weight of aggregates as filler material]

Providing and laying of Hot Mix Semi Dense Asphaltic Concrete(SDAC) using crushed stone aggregate of quality, size and grading as specified and cement as filler of quality as specified and Viscosity Grade Bitumen (supplied in Bulk) in proportions as per job mix formula and laid to specified levels, grade and camber as per specification, drawings and as directed by the Engineer-in-Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values ocompaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade VG-30 content shall be taken as 120 kg/m3 of mix supplied in Bulk produced by Govt. Refineries and 2% cement by weight of aggregates as filler material].

Providing and laying of Hot Mix Dense Asphaltic Concrete(DAC) using crushed stone aggregate of quality, size and grading as specified and cement as filler of quality as specified and Polymer Modified Bitumen (PMB) 76-10 (supplied in Bulk) in proportions as per job mix formula and laid to specified levels, grade and camber as per specification, drawings and as directed by the Engineer-in-Charge including compacting with 8-10 tonne, preferably vibratory road roller of adequate capacity to achieve the specified values of compaction, strength, surface accuracy complete [for tendering purpose PMB of grade PMB-70 content shall be taken as 135 kg/m3 of mix supplied in Bulk produced by Govt. Refineries and 2% cement by weight of aggregates as filler material].

Scarifying existing compacted/loose moorum surface including disposal of rubbish lead upto 50m and consolidation with power road roller of 8 to 10 tonne capacity..

Supplying and Banking Moorum for filling by mechanical means in layers not exceeding 20 cm. in depth, breaking clods, watering, rolling each layer with 1/2 tonne roller, or wooden or steel rammers, and rolling every 3rd and top-most layer with power roller of minimum 8 tonnes and dressing up, in embankments for roads, flood banks, marginal banks, and guide banks or filling up ground depressions etc. to achieve desired CBR of 4.

Laying and spreading available soil to depth of 450mm, pulverising, mixing the spread soil in place with rotavator with desired per cent slaked lime having minimum content of 70 per cent of CaO, grading with motor grader and compacting with the road roller at OMC to the desired density to form a layer of improved sub grade to achieve desired CBR of 4 .( For estimate purpose 3.75% of lime by weight of the soil taken ie 60 kg of lime for 01 cum of soil mass .)

Earth work in excavation by mechanical means (Hydraulic excavator)/manual means over areas (exceeding 30 cm in depth, 1.5 m in width as well as 10 sqm on plan) including getting out and disposal of excavated earth lead upto 50 m and lift upto 1.5 m, as directed by Engineer-in-charge.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering- All work upto plinth level (a)1:5:10 (1 cement: 5 coarse sand : 10 graded stone aggregate 40mm nominal size).

Providing and laying Non Pressure NP-4 class (Heavy duty) R.C.C. pipes including collars/spigot jointed with stiff mixture of cement mortar in the proportion of 1:2 (1 cement : 2 fine sand) including testing of joints etc. complete 600 mm dia RCC pipes.

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering- All work upto plinth level (a)1:3 :6 (1 cement: 3 coarse sand : 6 graded stone aggregate 20mm nominal size).

Providing and applying primer coat with bitumen emulsion SS1 grade confirming to IS:8887 on prepared surface of Granular Base including clearing of surface and spraying primer at the rate of 0.70 kg/sqm using mechanical means complete in all respects as per directions of Engineer-In-charge.The contractor shall quote his rates assuming quantity of bitumen emulsion as 0.70 kg/Sqm. If the actual quantity of bitumen emulsion varies from the quantity assumed above, necessary cost adjustment for deviation in the quanity of bitumen emulsion shall be done as per rate in actual supply voucher from nearest refibery a the time of execution. The rate of bitumen emulsion exclusive of GST shall only be considered for payment.

Providing and applying tack coat using hot straight run bitumen of viscosity grade VG 10(80/100) conforming IS:73 including heating the bitumen, spraying the bitumen with mechanically operated spray unit fitted on bitumen boiler, cleaning and preparing the existing Runway/ road surface as per specifications complete in all respects as per direction of Engineer-In- Charge. If the actual quantity of bitumen varies from the quantity assumed above, necessary cost adjustment for deviation in the quantity of bitumen shall be done as per rate in actual supply voucher from nearest refinery at the time of execution. The rate of VG-10 exclusive of GST shall only be considered for payment a) 0.35 kg/Sqm on existing bituminous surface

Filling the sub surface drain in runway with stone aggregate of Size D10 = 50mm size and consolidating to the required depth of minimum 1.00m, all as per the directions and satisfaction of Engineer-in-charge. The gradation requirement for the aggregates is mentioned in Technical Specification) The rate is including filling with aggregate, consolidating and Disposal of unserviceable material within airport premises with all lift and leadsetc.complete as per the direction of Engineer-in-charge.

Providing and laying Non woven Geotextile of approved make to prevent ingress of soil, all as per approved drawings and as per technical specifications. Material should confirm to detailed specifications and drawings as attached.

Providing and placing ISI mark Semi Perforated PVC pipes of outer diameter 200mm for drainage behind the reinforced soil walls. Specification of perforation is as below ( dia of holes = 5-6 mm, Spacing of holes = 25-30mm, Pipe thickness =8-10mm).

Supplying, stacking and Spreading M sand and consolidating each deposited layer by ramming and watering, complete including preparation of the surface

White washing with lime to give an even shade : New work (three or more coats)

Painting runway / taxi track / apron marking with adequate no. of coats to give uniform finish with road marking paint of superior make as approved by the Engineer-in-charge i/c cleaning the surface of all dirt, scales, oil, grease and other foreign material etc. and lining out complete. New work (Two or more coats)

Removing/dismantling the existing joint filling sealant in the expansion/construction/dummy joints and preparing the surface for joint filling including disposal of rubbish to the dumping ground with all leads and lifts all as per the directions of EIC.

Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433-1995. in expansion/ construction/dummy joints including rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. complete as per direction of Engineer in-Charge & particular specifications. i) Expansion Joints of size 25 mm wide and 10 mm deep over 30 mm dia closed-cell Polyethylene foam back-up rod, as per manufacturers specifications and sketch at Appendix A. [Note: For purpose of payment, quantity (Length x Width x Depth) of Polysulphide sealant only will be measured.]

Providing and laying in position Polysulphide sealant of approved make conforming to BS-5212-1990 or IS: 11433-1995 in expansion/ construction/dummy joints including rounding off edges, applying 2 coats of approved primer compatible with the brand of Polysulphide and preparing the surface and applying masking tape along the edge of joint to prevent accidental spillage of sealant on top surface and to give neat finish to the sealant and removing the masking tape after application of sealant etc. complete as per direction of Engineer in-Charge & particular specifications. i) Construction Joints of size 10 mm wide and 10 mm deep over 12 dia closed-cell Polyethylene foam back-up rod, as per manufacturers specifications and sketch at Appendix-‘A’. ii) Dummy Joints of size 10 mm wide and 10 mm deep over 12 mm dia closed-cell Polyethylene foam back-up rod, as per manufacturer’s specifications & Sketch at Appendix 'A'. [Note: For purpose of payment, quantity (Length x Width x Depth) of Polysulphide sealant only will be measured.]

Providing and laying factory made chamfered edge Cement Concrete paver blocks In foot path, park & lawns driveway or light & traffic parking etc. of required strength, thickness & size/ shape, made by table vibratory method using PU mould, laid in required colour & pattern over 50mm thick compacted bed of course sand, compacting and proper embedding/laying of inter locking paver blocks into the sand bedding layer through vibratory compaction by using plate vibrator, filling the joints with sand and cutting of paver blocks as per required size and pattern, finishing and sweeping extra sand, all complete as per manufacturer's specifications & direction of Engineerin- Charge. 80 mm thick cement concrete paver block of M-30 grade with approved colour, pattern and design.

Supply of 2 x 105W bi-directional halogen type inset fitting with Yellow (R) / Clear (L) filters for Runway edge applications suitable for use in 6.6A airfield lighting circuits normally supplied from 200W isolating transformer and complete with lens support mechanism, lens clamping mechanism, gaskets, one cable lead of two pin secondary, including shallow base other accessories etc. complete as required meeting the requirement of ICAO Annex -14 and Aerodrome Design Manual part - IV amended upto date.

Supply of 2 x 105W bi-directional halogen type inset fitting with Clear/Clear filters for Runway edge applications suitable for use in 6.6A airfield lighting circuits normally supplied from 200W isolating transformer and complete with lens support mechanism, lens clamping mechanism, gaskets, one cable lead of two pin secondary, including shallow base other accessories etc. complete as required meeting the requirement of ICAO Annex -14 and Aerodrome Design Manual part - IV amended upto date.

Supply of 1x16 sq.mm. 5 KV grade PVC insulated & PVC sheathed antitermite & antirodent stranded copper conductor Airfield lighting cable confirming IS 1554 (Part II) with upto date amendment as required confirming to particular specifications etc. as required.

Supply of 5 KV grade plug and receptacle of type I class B connector, suitable for field attachment with 5 KV grade PVC insulated PVC sheathed single core copper conductor cable of 16 Sq.mm size and conforming to the relevant IS specifications as required for following size. 16 Sqmm

Supply of 2C x 4 Sq.mm AFL secondary lead of following length provided with 2 pin male connector at one end.

i) 20 mtr length

ii) 30 mtr length

iii) 40 mtr length

iv) 50 mtr length

Supply of 5 KV grade 200 W 20/6.6 A Isolating Transformer.

Supply of DOBEFIL 60 of Dr. Beck & Co. or equivalent sealant material suitable for fixing bottom box of inset approach/threshold fitting etc. as required

Supply of hardener 758 for DOBEFIL 60 sealant as required

Supply of CI Transformer Housing Box water tight, round shape of outside dia 330mm height 450mm made of 10mm thick all round except on top surface which is 15mm thick having a clear opening of 220mm at the top surface and 6 Nos. M10 tapped holes at the hole centre of 260mm to receive light fittings base plate and bolts. The box shall have a clear hole at one side surface centre at 75mm above bottom surface and suitable to receive 50mm dia B class GI/ HDPE pipe check nuts and also have clear hole on side surfaces from centre at 175mm above bottom suitable to receive 15mm dia B class G.I pipe and check nuts. The box shall have two earth bolts of M 10 x 30 mm inside near the hole (100mm above bottom surface) and a drain hole at the bottom suitably tapped to receive 1/2"dia., B class GI pipe as required.

Supply of following Cylindrical type Cast Iron adaptor boxes with machined top of size 330mm with thickness of 15 mm at top and 10 mm on balance portion of box suitable to fix on Cylindrical type Cast iron boxes of 330 mm dia.

a) 50 mm height

b) 75 mm height

c) 100 mm height

d) 125 mm height

Supply of HDPE pipe of PN 6 and PE 63 of following size HDPE pipe along with all accessories like socket, bend, couplers etc., conforming to IS 4984, Part II with up to date amendments complete as required. 50 mm dia

Laying of one number PVC insulated and PVC sheathed/XLPE power cable of 5 kV grade 6 sq. mm / 16 Sq.mm size in the existing RCC/HUME/METAL/ duct/culvert/ drainage pipe as required.

Excavation for cable trenches in soft soil, depth upto 75 cm including dressing of sides lift upto 1.5 m, getting out the excavated soil, refilling with excavated soil after laying of cable/ pipe etc. and disposal of surplus excavated soil as directed, within a lead of 50 meters etc as required.

Supplying and laying of following size ISI marked DWC HDPE pipe 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/ duct ., complete as required. 50 mm OD, 38 mm ID

Cutting of cable groove with kerf cutting machine for laying following number of 2x4 Sqmm secondary leads meant for inset type taxiway fitting on the concrete/ bituminous taxiway surface including kerfing, chiselling, cleaning and filling the groove with departmentally supplied sealant compound after laying secondary lead including jute covering for protection etc. as required. a) 01 run of cable

Installation, testing and commissioning of inset type Runway edge light fittings in the bitumen/ concrete surface using core cutting machine and departmentally supplied Dobefil 60 compound & Hardener 758, installation and aligning of inset fitting using suitable jig, closing of shallow base with sealant material, connecting with secondary leads, providing Insulation tape etc. as required.

Installation of cylindrical type C.I. transformer housing box in bituminious/concrete surface with a base concrete of 1:3:6 ( 1:cement, 3:coarse sand, 6:concrete of 20 mm nominal size) of size 630x630x100mm thick and concrete of 1:2:4 ( 1: cement, 2 : coarse sand, 4 : concrete of 20mm nominal size) at base and all around the CI box of 150 mm thick and a pedestral concrete of 1 mtr x 1 mtr near the ground level at a depth of 20 cm with suitable coping at top with required manpower, tools etc., including cutting bituminous/concrete, excavating soil, aligning the boxes, complete as required.

Supply and fixing of MS base plates of 10mm thick, 330 mm dia provided with 6 nos holes for M-10 SS bolts, for covering the CI transformer housing box including providing gaskets, and SS bolts etc. complete as required.

Dismantling of the existing runway/ turning pad/taxiway edge light fittings including disconnecting the isolating transformers and series cable, shifting the dismantled items to store/ new location etc. as required .

Fixing of following Cylindrical type Cast Iron adaptor box above existing Cylidrical type Cast iron box of 330mm dia. using 6 Nos. M10 SS bolts and neoprene gasket of 3mm thick icluding providing 1:2:4 concrete of 150 mm thick all around the box, flushing the box with runway surface etc. as required.

a) 50 mm height

b) 75 mm height

c) 100 mm height

d) 125 mm height

Installation testing and commissioning of Elevated type Runway turning pad/ runway edge/ taxiway edge lights on the existing transformer housing boxes including connecting the Esna connectors with the series cables, connecting the secondary lead, isolating transformers, levelling, aligning etc. complete as required and as specified.

Dismantling manually/ by mechanical means including stacking of serviceable material and disposal of unserviceable material within 50 metres lead as per direction of Engineer-in-charge : bituminous road / concrete

Providing and laying in position cement concrete 1:2:4 (1 cement : 2 coarse sand: 4 graded stone aggregate 20 mm nominal size) etc excluding the cost of centering and shuttering - All work up to plinth level: including form work etc as required.

Laying of 50 mm dia PN6, PE63 HDPE pipe (i/c other accessories) in the runway/ taxiway shoulder including demolishing bituminous/concrete surface and providing 1:2:4 concrete in the groove with required manpower and tools etc, including connecting the HDPE pipe with the CI transformer box, aligning the pipe etc.as required.

Numbering of Taxiway/ Runway light fittings serially with ISI marked enamel paint with double coat, yellow paint as background and numbering with black paint for suitable size etc., complete as required.

Earthing with G.I. earth pipe 2.75 metre long, 40 mm dia including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe etc. with charcoal/ coke and salt as required.

Supply and laying of 6 SWG dia GI wire along with cable including providing lugs for termination, etc. complete as required