Bhabha Atomic Research Centre Tender

Notes applicable to EARTHWORK EXCAVATION & FILLING WORKS : The rate quoted is deemed to have included the following: a) Removal and cutting of all kinds of vegetation, shrubs, bushes, stumps , roots, grass, weeds, light/heavy jungle etc., trees upto girth of 30 cm when measured 1 metre above ground level alongwith roots, including disposal/stack in the identified location. b) shoring, strutting, stepping, dressing, grading required for keeping the earth in position on sides of trenches with approved timber/steel accessories wherever necessary to prevent sides from falling including bailing or pumping out of water if necessary including removal of debris/unserviceable materials and excavated excess soil, if any. c) dewatering of both ground and surface water, including removal of slurry generated while excavation and keeping the area free from water, to be let out of the building area through proper pipes & channels if required by suitable pumps, d) watering, ramming and thoroughly consolidate the bottom of all excavations & ground before the construction of foundation/footing/plinth beam, filling in basement or other work is commenced. e) the loose pockets shall be excavated and compacted after back filling as directed by Engineer-in-charge, as per detailed specification and conforming to safety rules during progress of the work. f) Contour levels to be taken jointly with the Engineer-in-charge and prior written approval be taken before starting any excavation/ filling at every 3 m grids for arriving at the actual quantity

g) Backfilling will be done in layers of thickness as specified below. h) Cost inclusive of necessary royalties, seigneiorage charges and other charges to supply all the required construction materials, i) cost of items shall include all labour charges, hire charges of machinery, lubricants, fuels and tests etc. j) Measurement/Payment will be reststicted to PCC/drawing dimensions only. k) Clearing & grubbing and removal of top 150 mm soil and compaction of the original ground with vibratory power roller to achieve hard and level surface including the disposal of removed top soil within a lead of 200 m from site boundary. l) It shall include necessary excavation, backfilling of pits resulting from uprooting of trees and stumps to required compaction, handling, salvaging, and disposal of cleared materials.

Filling of areas and construction of Embankment/subgrade/ earthen shoulders with approved quality murrum/gravel brought from outside sources including Supply of all materials, in road works and the area wherever specified including breaking clods, storing, transportation, watering, with compacted thickness of each layer not exceeding 250 mm with suitable vibratory roller/ 200 mm thick with 8 to 10 ton capacity power roller to achieve 95% proctor density for embankment & 97% proctor density for Subgrade and Shoulders at optimum moisture content, all leads and lifts, bailing/ pumping out of water to keep site dry while backfilling. Cost shall include conveyance of all materials, labour, machinery, seigniorage charges etc. complete. The rate quoted shall include loading, unloading, hire and fuel charges for tools and plants and other incidental charges etc. The rate quoted shall also include compaction of original ground by vibratory power road roller, complete all as per drawings, specifications and as directed by the Engineer-In-charge.

Earth work excavation from 0.00 to 1.50 m depth from Average Ground Level by mechanical means (Hydraulic excavator) / manual means in all types of soil other than soft and hard rock,dressing the sides of foundation, ramming of bottom etc. including shoring and dewatering (if necessary) and refilling with selected excavated earth in layers of not more than 500 mm thick, each layer well rammed and consolidated including disposing the surplus earth within a distance of 200 m all as per specifications including clearing Jungle, uprooting of vegetation, grass, etc. complete and as directed by the Engineer-in-charge

Providing and fixing dry stone pitching 30 cm thick laid in required profile with hammer dressed stones having no side less than 22.5 cm, with minimum depth of 25 cm including preparing the bedding surface etc. all complete as directed by the Engineer-incharge

Providing and laying non pressure NP3 class RCC Hume pipes (Medium Quality) with collars jointed with stiff mixture of cement mortar in the proportion of 1:2, laying to the levels, slopes and as per the drawings and specifications and as directed by the Engineer-in-charge including testing of joints etc. complete.

1200 mm Dia RCC Hume Pipe Class Np3

900 mm Dia RCC Hume Pipe Class Np3

600 mm Dia RCC Hume Pipe Class Np3

Providing, centering, shuttering Form work using PVC film faced plywood for all types of structures including necessary strutting, proping, staging, supports, bracings etc. and deshuttering the same after the specified time all as per drawings, specifications and as directed by the Engineer-in-charge at all levels

Providing and laying in position cement concrete of 1:3:6 (1 cement, 3 crushed sand, 6 graded stone aggregate of maximum size 20 mm) including consolidation, finishing, curing etc. complete as per specificationsand drawings but excluding the cost of Form work shuttering, centering Complete at all levels

Providing and laying in position Plain Cement Concrete (PCC) of grade M-30 using 20mm maximum size aggregates and crushed/River sand of approved quality including admixtures of approved quality (plasticiser or super plasticiser) if required, including weigh batching, mechanical mixing, transporting, placing, vibrating, consolidation, finishing, curing etc. complete but excluding the cost of centering, shuttering and reinforcement complete as per specifications up to Plinth Level.