NHDC Limited Tender

Demolishing R.C.C. work manually/ by mechanical means including stacking of steel bars and disposal of unserviceable material within50 metres lead as per direction of Engineer - in- charge.

Chipping of unsound/ week concrete material from slab, beams, columns etc.with manual chisel and/ or by standard power driven percussion type or of approved make including tapering of all edges, making square shoulders of cavities including cleaning the exposed concrete surface and reinforcement with wire brushes etc. and disposal of debris for all leads and lifts complete as per direction of Engineer-in-charge: 75 mm average thickness.

Drilling 35 to 40 mm diameter grout holes in concrete / rock by percussion drilling using jackhammer or stopper drills as directed to specified depth for consolidation/ contact grouting including cost of all materials, machinery, labour, ventilation, lighting, drainage, dewatering cleaning holes and all other ancillary operations etc. complete.

Drilling 50 to 75 mm dia. holes vertical or inclined upto 10 degrees to vertical in rock / masonry / concrete by percussion drilling method using waggon drill or any other suitable equipment including cost of all materials, machinery, labour, re-drilling through partially set grout wherever required etc. complete. :Beyond 0 m to 06 m from surface :

Providing and fixing 25 mm dia. MS bar anchors with mechanical wedge including epoxy grouting complete., as per specifications and directions of Engineer-in- charge.

Providing and fixing 32 mm dia. steel anchor bar including power grouting etc. complete, as per specifications and directions of Engineer-in- charge.

Providing, fabricating and placing in position steel reinforcement bars for Reinforced cement concrete / Plain Cement Concrete structures including cost of all materials, machinery, labour, cleaning, straightening, cutting, bending, hooking, lapping / welding joints wherever required, tying with 1.25 mm diameter soft annealed steel wire etc. Complete.

Providing and fixing 25 mm dia. 2.75 m long ribbed steel anchor rods with one end split and driven firmly using steel wedge into 1.25 m deep 38 mm dia. hole drilled in bed rock and other end provided with L-bend for embedding in concrete/ masonry for spillway and appurtenant works including cost of all materials, machinery, labour, steel wedge, drilling and cleaning hole, filling hole with thick cement slurry, driving anchor rod etc. complete.

Providing and fixing 25 mm dia. 3 m long cold twisted deformed steel dowel bars with one end driven into 38 mm diameter 1.50 m deep hole drilled in bed rock and other end provided with L- bend for embedding in concrete / masonry of over flow / non-over flow blocks and other appurtenant works including cost of all materials, machinery, labour, drilling and cleaning hole, filling hole with specified cement mortar, driving anchor rod etc. Complete.

Epoxy bonding of new concrete to old concrete using epoxy resin painting suitable for dry and wet surface of the concrete with having minimum bond strength to concrete 2.5 MPA including preparation of old concrete surface with wire brush and compressed air , sealing of all cracks or spalling by epoxy injection of epoxy mortar or epoxy grouting as per requirement. Applying epoxy resin bond including cost of all material, machinery, T&P, cost of other incidental charges and testing as per relevant specifications etc. complete.

Providing and laying Reinforced cement concrete for construction of piers,abutments, portal frames, pier caps and bearing pedestals and seismic arresters over pier/ abutment caps at all locations with specified grade using Ordinary Portland Cement (conforming to strength requirement of IS:8112) including the cost of steel centering and shuttering etc. complete including testing of materials etc. for casting pier & pier cap in one/two stage, necessary tools, plants, machinery and all related operations as required to complete the work as per drawings and Specifications with all leads, lifts and depths true to level and position but excluding the cost of providing reinforcement. Reinforcement shall be measured and paid separately. Note:- Cement content considered in this item is 480 Kg./Cum. Excess/ less cement used as per design mix is payable/ recoverable separately,Reinforced Cement Concrete -M-60

Providing and laying M- 25 grade Reinforced Cement Concrete Design Mix for filling foundation & Sub Structure using graded aggregates clean, hard including cost of all materials (excluding cost of providing and placing reinforcement steel/bars ), machinery, labour, formwork, cleaning, batching, mixing, placing in position in alternate panels as directed, levelling, compacting, finishing, curing, packing joints of shuttering etc. complete. Using graded aggregate of maximum size:- 40 mm

Earthwork for embankment (hearting/ casing) using selected soil from approved borrow areas in layers of 250 to 300 mm (before compaction) including cost of all materials, machinery, labour and dressing, all other operations such as collection of soil, spreading soil in layer of specified thickness, sorting out, breaking clods, levelling, sectioning edges / sides, (excluding watering and compacting).