Development of Darbhanga Airport

Amount

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. All kinds of soil.

Supplying and filling river sand in excavated areas below taxiway, shoulders, apron, link taxiway, runway, road etc as per specification to the specified level /grade including watering, ramming, consolidation and dressing etc all complete.

Providing and laying graded granular material (moorum) in layers not exceeding 20cm (loose) in thickness (each layer) and as directed by the Engineer-in-charge. Breaking clods, watering, consolidating each layers with power road roller 8-10 tonne, under optimum moisture content to give density not less than that specified of the maximum modified standard proctor density at OMC including levelling, fine dressing to the required camber, grade and slope etc. complete. Material of CBR-20 minimum (payment to be made for the compacted quantity only).

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 0.075 mm ) to wet mix macadam (WMM) specification including premixing the material with water at OMC in mechanical mix plant, carriage of mixed material by tipper 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 applying tack coat using hot straight run bitumen of Viscosity grade VG-10 (80/100) including heating the bitumen, spraying the bitumen with mechanically operated spray unit fitted on bitumen boiler, cleaning and preparing the existing road surface as per specifications. a) On existing black topped surface @ 0.50 Kg /sqm

Providing and applying tack coat using hot straight run bitumen of Viscosity grade VG-10 (80/100) including heating the bitumen, spraying the bitumen with mechanically operated spray unit fitted on bitumen boiler, cleaning and preparing the existing road surface as per specifications. b) On WMM surface @0.75 kg/sqm

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 specified and Viscosity Grade VG-30 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 of compaction, strength, surface accuracy complete [for tendering purpose VG bitumen of grade VG-30 shall be taken as 110 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 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 VG-30 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 of compaction, 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].

Banking excavated earth in layers not exceeding 20 cm in depth, breaking clods, watering, rolling each layer with ½ 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 etc., lead upto 50 m and lift upto 1.5 m. All kinds of soil

Supplying and filling approved good quality earth including royalty brought from outside approved sources/queries (excluding rocks/pebbles etc.) in embankments, depression, shoulder etc. in layers not exceeding 20cm in depth, breaking clods, watering and consolidating each layer with power roller of minimum 8 tonnes and dressing up as per the designed slope complete. The minimum CBR value of 20% shall be ensured on bottom of this layer and CBR less than 4% shall be ensured on top of this layer for deceleration of aircraft.

RAKESH KUMAR AND COMPANY

CHANDAN SINGH INFRASTRUCTURE PRIVATE LIMITED

Sri Ram Enterprises