Rehabilitation of contour canal left out reaches from LS 9 400 km to LS 9 600 km and LS 10 050 km to LS 10 250 km in Anaimalai Taluk of Coimbatore district

Amount

Clearing the Scrub jungle and destroying the same effectively as directed by the Engineer incharge of the works and complying with standard specifications.

Removal of loose boulders in various sizes from 150mm to 625mm and depositing on bank with initial lead of 10m & initial lift of 2m and as directed by the Engineer incharge of the work and complying with standard specifications.

Earthwork excavation in sand, silt or other loose soil, wet sand or silt not under water,light black cotton soil, sandy loam and ordinary soil including depositing the excavated earth within the places as shown by the engineer incharge of work with initial lead of 10m and lnitial lift of 2m complete complying with standarad specifications (removal of silt).

Dismantling the existing dilapidated Plain Cement Concrete lining inside the canal/Tunnel portion for any thickness of walls of structure specified and clearing away the debris within initial lead of 10m and lnitial lift of 2m complete complying with standarad specifications and as directed by the Engineer incharge of work.

Dismantling the existing dilapidated Random Rubble Masonry wall of any thickness of specified structures in cement mortar,clearing away and carefully stacking the materials useful for reuse in specified area within initial lead of 10m and lnitial lift of 2m complete complying with standarad specifications and as directed by the Engineer incharge of work.

Removing hard rock by wedging, chiselling and trimming to proper shape where blasting is prohobited and clearing away the debris within initial lead of 10m and lnitial lift of 2m,levelling the site etc., complete complying with standarad specifications and as directed by the Engineer incharge of work.

Extra for every addiitonal 1m lift or part there of over the initial lift for excavated earth, loose boulders, dismantled materials etc., complete complying with standarad specifications and as directed by the Engineer incharge of work.(Extra 3Lift)

Extra for every addiitonal 1m lift or part there of over the initial lift for the blasted materials complying with the standard specification and as directed by the Engineer incharge of work.

Drilling holes of 40mm dia size in the rock surface to the required depth and spacing in a staggering manner as directed by the Engineer incharge of the works.

Supplying and fixing in position 25 mm dia steel rods etc.., complete as directed by the departmental officers (the steel required for the work is to be purchased by the contractor as specified in the special conditions).

Supplying and erecting centering for sides and soffits including necessary supports and strutting upto 3.29m height for vertical / sloped surface as detailed below with all cross bracings using mild steel sheets of size 90cmx60cm and 10BG stiffened with welded mild steel angle of size (25x25x3)mm for boarding laid over silver oak joists of size (10x6.5)cm spaced at about 90cm C/C and supported by casurina props of 10cm to 13cm dia spaced at not more than 75cm C/C etc., complete complying with standard specification and as directed by the departmental officers.(for retaining wall, abutment, pier etc).Scaffolding and centering charges for the structural components is including the cost and conveyance of all material to the site including all labour charges and incidental charges etc., complete complying with standard specifications and as directed by the Engineer in charge.

Centering upto 3.29m height For Canal Work

Centering above 3m height For Canal Work

Supplying and fabrication of Steel required for all works involved in the schedule including cost of steel, cost of fabrication, labour charges for cleaning the rods straightening, cutting, bending, tying grills including overlapping to the required length wherever necessary and placing the reinforcement in position as specified in the drawings including cost of binding wire, provision of spacer bars, cover blocks and all other incidental charges etc. complete as per standard specification and as directed by the departmental officers.

Plain Cement concrete M10 grade using 20 mm HBGS jelly including dewatering by bailing/ pumping wherever necessary amd laid in layers of not exceeding 15cm thick finishing , curing etc., complete complying with standard specifications and as directed by the Engineer in charge of the work.

Providing and laying in position, Standardised Reinforced Cement Concrete Mix M20 Grade in accordance with IS:456-2000,using 20mm and down graded hard broken granite stone jelly for all RCC works with minimum cement content of 325 kg/m3 and maximum water cement ratio of 0.55, including admixture (plasticiser / super plasticiser) in recommended proportions as per IS:9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability with above (5.0 cu.m) 7730 kg of 20mm machine crushed stone jelly and with about (3.3 cu.m) 5156kg. of 10-12mm machine crushed stone jelly and with about (4.79 cu.m) 7670kg of M-Sand, but excluding cost of reinforcement grill and fabricating charges, centering and shuttering and also including laying, vibrating with mechanical vibrators,finishing,curing, etc., and complying with standard specification and as directed by the departmental officers. The coarse and fine aggregates to be used should comply with the requirement of IS standards. (No separate payment will be made by the Department for the excess usage of materials)

Sand blasting operations for the exposed rock surface with clean and well sieved sand with use of drum and nozzle including cost of sand, cleaning the surface with air water jet using compressor etc complete as directed by the departmental officers

Shotcrete175mm thick (for weathered rock protection in tunnel area) with M25 grade and 10mm down size aggregate using Robotics spray arm shotcrete machine and wire mesh (102mm*102mm*5.74mm) cutting, placing and fixing into position of (102*102*5.74) square shape, Fy=500Mpa and fixing Geocomposite drain behind shotcrete using Geocomposite material and Supplying and fixing bearing plates 150mmx150mmx10mm of MS 250 grade, Supply and fixing of Rock anchors for rock fall netting of 2.0m length and 25mm dia steel rod per 4sqm with drilling in 38mm dia 360 degree with contractor's men, consumables (including additives), tools and plants,equipment's, machiners,including alllead and lifts, loading,unloading,wastage,rebound,curing,wire mesh concrete etc.,complete as directed by Engineer incharge of the work.

Supplying and fixing PVC Water Bar 150mm wide with single bulb in position including cost and coveyance of all materials to the work site complete complying with standard specifications and as directed by the departmental officers.

Earthwork excavation in hard red earth, shales, murrams, gravel, stoney earth and hard gravelly soil from the places approved by the Engineer in charge and conveying the same with a lead of 7Km including loading and unloading for filling the sides of canal and embankment portion in layers of not exceeding 15 cm thickness, compacting thoroughly using suitable compactor/ pneumatic tampers and neat sectioning, etc. complete complying with technical specifications and as directed by the Engineer in charge of the work.

Special raised pointing in R.R. masonry by racking out joints to a depth of 60 mm to 75 mm with racking tools clearing the surface with wire brush,filling the racked joints with C.M. 1:2 to a full depth well pressed and caulked in the joints and rubbed smooth as directed by the Engineer incharge of the work.

Supplying and fixing of bituminous expansion pad of 12mm thick. In the contraction joints including cost of material, conveyance to worksite and labour charge for fixing complete as directed by the engineer in charge of work.

Supplying and filling of Bituminus sealing compound in contraction joints including cost of material and labour chrges etc complete as diected by the the engineer in charge of work.

Supplying and fixing of 110 mm dia PVC pipes with no fine concrtete as a weep holes including cost of material and labour chrges etc complete.as diected by the departmental officers.

Washing and cleaning the grout holes by means of sending water at different pressure until the return water turns out to be of the same character as the original water inserted without any foreign material complying with technical specification and as directed by the Engineer in charge of work.

Inclined drilling inside the gallery for in 360 degree with diamond drill bit AX Size using single tube core barrel in the reinforced cement concrete and RR masonry to the required depth including cost of transportation charges of all materials, pumps, Waterline fuel and other consumable materials etc., to site and collection of core from the bore holes, arranging them in serial order in the gunny bags and numbering the same, as directed by the Engineer in charge of the work and complying with technical specification.

Grouting AX size grout 360 degree holes up to bottom level at different stages or as directed by the Engineer - in -charge of the work for grouting in random rubble masonry and cement concrete portion in the drilled holes of different elevation in stages using packer method of required pressure in each elevation using fine cement of blains value of about 3500 mixed with 5% bentonite, including cost of cement, grouting assembly and other charges of labor and machinery as directed by the Engineer- in –charge of the work and complying with technical specification. (during the grout hole being grouted have in the vicinity of the grout hole being grouted have to be continuously jet washed by the agency during the grout work)

Hire charges for Diesel pump set 5-HP for dewatering the stagnant water in the Canal with crew including cost of fuel and transporting charges etc complete and as directed by the departmental Engineers.

GST at 18%

N BALASUBRAMANIAN