Construction of stable RCC foundation system for MC-18 facility at VECC Campus, Bidhannagar, Kolkata

Amount

Mobilisation and demobilisation of suitable boring plant and all other allied equipments like Minimum 1 boring rigs or as required number of boring rigs to complete the job in time, survey equipments and all other insitu tests equipments and manpower required to complete the scope of this work.

Boring vertically for conducting confirmatory test before commencement of RCC bored pile through all kinds of soils, weathered rock and soft rock, boulders, if any met during drilling with suitable and adequate equipment as required for the depth as measured below existing ground level. 'Note: For Boreholes location & depth will be as per decision of Engineer-in-charge.

Depth from 0.00 M and up to 10.00 M

Depth from 10.00 M and up to 20.00 M

Depth from 20.00 M and up to 30.00 M

Depth from 30.00 M and up to 40.00 M

Obtaining 90 mm diameter, 450 mm long undisturbed soil samples (UDS) in soil soft and weathered rock and collecting packaging and labeling, complete as per specifications and as directed by Engineer-in-charge.

Conducting Standard Penetration Tests (SPT) with part of the disturbed soil samples to be coated with paraffin wax and sealed immediately on collection to completely retain all moisture within the sample with packaged and scaled, complete as per specifications and as directed by Engineer-in-charge.

Static Cone Penetration Test (SCPT) (as per IS:4968 (Part-III) - 1976 -Reaffirmed in 2002) to evaluate safe bearing capacity and settlement of cohesionless soil and undrained cohesion in clays. This test is to be carried out upto refusal, complete as per specifications and as directed by Engineer-in-charge.

Conducting Sand Replacement Method (SRM) test as per IS: 2720(Part XXVIII)-1974:Reaffirmed in 2010 to evaluate bulk density and dry density of soil, as per specifications and as directed by Engineer-in-charge. 'Note : The test shall be conducted on DS collected from each borehole, the DS shall correspond to each soil stratum.

Grain size analysis including Grain Size Distribution Curves as per practice 'Note :The test shall be conducted on DS/ UDS collected from borehole as directed by Engineer in charge.

Sieve analysis. As per IS:2720(Part-4)- 1985 Reaffirned in 2006.

Hydrometer or Pipette analysis

Conducting test for soil classification and Percent fines as per IS : 1498 - 1970 (Reaffirmed in 2006) to evaluate soil classification & Identification. 'Note : The test shall be conducted on DS/ UDS collected from borehole as decided by Engineer in charge.

Liquid limit, plastic limit and plasticity index as per IS: 2720 (Part 5) Reaffirmed in 2006. 'Note : The test shall beconducted on DS/ UDS collected from borehole as decided by Engineer in charge.

Shrinkage limit and shrinkage ratio to determine Atterburg limits as per IS: 2720 (Part 6) Reaffirmed in 2001. 'Note : The test shall be conducted on DS/ UDS collected from borehole as decided by Engineer in charge.

Field density, voids ratio and natural moisture content of UDS Tube samples by density bottle method, Pycnometer method as per IS :2720 (Part-II) - 1973 as directed by Engineer-in-charge.

Water content from UDS by oven drying method as per IS : 2720(Part II) - 1973 as directed by Engineer-in-charge.

Evaluation of Liquefaction Potential based on the other tests conducted in laboratory on undisturbed or remoulded samples of soil as directed by Engineer-in-charge.

Direct Shear Test on undisturbed soil samples or on soil samples compacted to specified density. Tests to be conducted as per IS:2720 (Part 13)-1993 (Reaffirmed in 2002) as directed by Engineer-in-charge. Note : The UDS shall correspond to each soil stratum. Hence can be decided only after receipt of borelog data. Test to be done in alternate boreholes and 2 samples assumed per borehole and as directed by Engineer-in-charge.

Unconsolidated Undrained

Consolidated Undrained, including pore water pressure measurement

Consolidated Drained, including pore water pressure measurement

Conducting soil sensitivity test prown to Liquifaction on UDS sample as directed by Engineer-in-charge. 'Note: The UDS shall correspond to each soil stratum. Hence it can be decided only after receipt of borelog data. Test to be done in alternate boreholes and 2 samples assumed per borehole and as decided by the Engineer-in-charge.

Conducting Cross Borehole test comprising of minimum Three boreholes one source bore hole & two receivers bore holes. The test shall be conducted as per latest ASTM-D4428 at each 1.5m depths intervals up to Maximum 40 m depth including mobilzation of Equipment and analysis of sample with preparartion of report as specification including Cost of PVC/Aluminum pipe casing, grouting and backfilling complete as per specifications and as directed by Engineer-in-charge. NB : The cost of boring shall be paid as per actual mesaurement as per item No. 2.

Triaxial Compression Strength Test on undisturbed soil samples or on soil samples compacted to specified density. Tests to be conducted asper IS:2720 (Part 11)-1993 (Reaffirmed in 2002) Note: The UDS shall correspond to each soil stratum. Hence can be decided only after receipt of borelog data. Test to be done in alternate boreholes and 2 samples assumed per borehole and as decided by the Engineer-in-charge.

Unconsolidated Undrained

Consolidated Undrained, including pore water pressure measurement

Consolidated Drained, including pore water pressure measurement

Conducting Vibratory Table Test as per IS : 2720(Part 14)-1983: Reaffirmed 2006 to evaluate the relative density of soil 'Note : The test shall be conducted on DS/ UDS collected from borehole as decided by Engineer-in-charge.

Preparation and submission of One copy of Draft report as specified followed by five (5) copies of Final report of Geotechnical Investigation as detailed in specifications along with (2) soft copies of the same on the CD. 'Note: 1. Final Report to be submitted shall include all field records, laboratory test results, graphs, analysis/test results, photographs showing details of field tests/ soil samples, recommendations etc. consisting of deliverables as per FORMAT which will be issued to the successful bidders. '2. Geotech Investigations for Soils will be carried out to evaluate the different type of test values as per FORMAT which will be issued to the successful bidders.

Forming vertical piles including initial test piles by boring through fill and all kinds of soils including hard murrum with gravel and chiselling through occasional boulders and soft / weathered / hard rock by continuous mud circulation technique and bailer boring / Rotary Drilling method as specified, including conducting Standard Penetration test on all piles in different levels as instructed by Engineer In Charge. The tremination of boring shall be done after cleraence from EIC, carting away the bored excavated soil/Muck shall be disposed outside the VECC campus at the own cost of contracting agency. Fixing reinforcement as per drawing, casting the piles with Specified grade concrete by tremie only, using graded stone aggregates of maximum size 20 mm, ordinary portland cement with a minimum cement content of 450 kg. per cubic metre of concrete and with water cement ratio including the water contained in the aggregates not exceeding 0.40, etc. all as specified. 'The Rate includes concreting a minimum of 600 mm above specified cut-off levels, cutting of piles at cut-off level specified including cost of all materials, admixtures, (approved super plasticisers), if used with the prior approval of engineer, labour, tools, excavation, dewatering by pumps or well points and also for cut-off chipping, all as required etc.excluding cost of Steel Reinforcement but including cost of boring with bentonite solution and temporary casing for appropriate length for setting out and removal of same complete. 'Note for piling works : 'a) The quoted rate shall be inclusive of mobilisation charges for erection and commission of all required machinery, equipments, piling rigs, casing pipes,cutting tools, cleaning bucket, materials, personnels, extra concrete above cut off level etc. at site and demobilisation on completion. No separate claims will be entertained due to variation in quantity of piles. b) The piles shall be measured from the cut off level to the approved strata. The rate shall include cost for additional concrete (if any) towards bulb formation,wastage while concreting etc. c) The rate shall include cost of socketing in hard rock as shown in structural drawing. 'h) The quoted rates shall include cost towards breaking of pile heads etc.

600 dia piles M 40 Grade Concrete in ordinary soils, murrum, soft rock and occasionally Hard Rock Boulders at depths upto 35 m from pile cut-off level as per drawing

Empty Boring for Piling from Ground level to Cut off Level of the Piles

For 600 mm Dia Piles

Conducting HSDLT (High Strain Dynamic Load Test) upto 120MT capacity as per ASTM D4945 & IRC 78-2014 in the above mentioned scope of work along with Mobilization and demobilization charges of dropping arrangement, drop hammer,testing instrument with engineer and helpers including hydra hire charges with preparation and submission of report.

Conducting Routine Vertical load testing of piles in accordance with IS2911 (PART IV) including installation of loading platform and preparation of pile head or construction of Test cap and dismantling of test cap after test etc. complete as per specification & as directed by the Project Engineer at site.

Routine Vertical load test upto 120 M.T. Capacity piles

Conducting Lateral load testing of piles in accordance with IS2911 (PART IV) including installation of loading platform and preparation of pile head or construction of Test cap and dismantling of test cap after test etc. complete as per specification & as directed by the Project Engineer at site.

Lateral Load Test on group of 2 Piles, each of lateral capacity up to 8.00 M.T.

Conducting Pile integrity Test/NDT inegrity testing on piles as per IS 14893 ans as per the direction EIC

From 0.00 to 1.50 m depth from Average Ground Level

Below 1.50 to 3.00 m depth from Average Ground Level

Below 3.00 to 4.50 m depth from Average Ground Level

Providing, Supplying, Filling in foundation or plinth using River sand in layers including compaction / consolidation complete all as per drawings and specifications as directed by Engineer-in-charge.

Providing and laying in position Cement Concrete (PCC) 1:3:6 (1 cement, 3 crushed sand, 6 graded stone aggregate of maximum size 20 mm)/ M10 with minimum cement content 220 Kg/CuM in foundation and plinth using 20mm maximum size aggregates and river sand of approved quality 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. Upto Plinth Level. Using Site Mix

Providing and laying in position cement concrete of 1:2:4 (1 cement, 2 coarse sand, 4 coarse aggregate of maximum size 20 mm) /M15 with minimum cement content 320 Kg/CuM including consolidation, finishing curing etc. complete as per specifications and drawings, but excluding the cost of Form work shuttering, centering and steel reinforcement complete as per specifications. At all Levels

Providing and laying in position Reinforced Cement Concrete (RCC) of grade M-30 using 20mm maximum size aggregates and river sand of approved quality including admixtures of approved brand and 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. At all Levels.

Extra over for providing RMC (Ready Mixed Concrete) confirming to IS:4926 (latest) in lieu of conventional RCC / PCC items supplied by approved RMC Plant for all type of structural elements/ RCC elements including transporting, pumping etc. complete as per instruction of the Engineer in charge. 'Note: The contractor shall obtain prior approval for RMC manufacturer from Engineer in Charge.

Providing , centering ,shuttering Form work using PVC film faced plywood to get a neat form finish surface for all types of structures including necessary strutting, proping, staging, supports 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. 'Note : 1) Steel staging will have to be used for all structural /RCC works at all levels / heights. '2) All surfaces adjacent to EPs, etc., shall be in true line and level & irregularities, if any, shall be rounded by mechanical grinding, chiselling, finishing the same using epoxy silica sand mortar at no extra payment. '3) The Design of Formwork shall be submitted for approval before commencement of work. '4) All tie rod holes, irregularities are to be made good with Water repellent chemical at Contractors own cost.

For Substructure

Providing patented cement based water proffing treatment from outside to basement, lift pits, trenches and other underground structures during construction, consisting of a water proof layer over cement concrete 1:3:6 bedding finished with Rough Shahbad stone/kotah stone of minimum 20 mm thick, well pointed in the joints with cement and approved make water proffing compound as per manufacturers specification and continuing the treatment after completion of floor slab & side walls on the outerface of walls upto 300 mm above the adjacent ground level complete as directed by the Engineer-in-charge. The total treatment of waterproofing treatment shall be around 75 mm for floors and 35 to 40 mm thick for walls. (Item includes testing of structures for water tightness) 'From 0.00 to 6.0 m depth using river sand. 'Notes: '1. The cost of 1:3:6 is not included in this item and is to be catered for separately. 2. A working space of about 600 mm shall have to be provided in the excavtion separately for the treatment of exterior faces of walls. 3. The water proofing treatment is to be Guaranteed for borne dry condition for a period of 10 years. 4. The measurement for payment shall be as per actual area covered by the treatment.

Providing and placing in position suitable PVC water stopper 230 mm wide and 8 mm thick confirming to IS:12200 for construction / expansion joint between two RCC member and fixed to reinforcement with binding wire before pouring concrete etc complete as per specification.

Providing TMT Bar FOR REINFORCED CEMENT CONCRETE at all levels including supplying, preparation of bar bending schedules,cutting, bending, transporting, fixing, tieing in position with 1.6 mm dia soft drawn annealed binding wire all labour charges, cost of cover blocks in specified grade of concrete etc. complete including cost of binding wire as per specifications and drawings. Steel Supplied by the Contractor shall confirm to Fe 500D grade conforming to IS – 1786 (Latest edition) and BARC specification. 'Steel supplied by the contractor. 'Note: '1) The contractor shall supply documentary evidence of purchase of steel, Test certificate from approved manufacturers and also testing third party from approved laboratories with out any extra cost. '2) Binding wire required for the work will have to be supplied by the contractor at their own cost and will not be measured for payment. '3) Cover blocks shall be of same grade of concrete.

Using TMT bars of specified grades of all sizes for all structures other than Piles. TMT bars to be supplied by the contractor shall confirm to IS – 1786 (Latest edition)

Supplying and providing Structural Steel work at all levels in Rolled Sections like Rail, angles, channels, beams, MS Plain/ square/Circular rods, flats, beam in monorails, girders, tubular sections, pipe sections, built-up sections, trusses, ladders, platforms, handrails, sag nods, gratings, plates of built up sections, gates, lifting hooks of pre cast blocks, etc., including supplying, cutting, bending to the required shape & curvature as specified in drawing, fabricating, erecting as required, welding and fixing in position to correct lines and levels using teakwood gutties including , Dye Penetration test ,painting with a primary coat of approved ZINC CHROMATE Primer & two coats of SYNTHETIC ENAMEL PAINT in approved make & shade for steel surfaces, cost of scaffolding etc. complete as per drawing, specifications and as directed by the Project Engineer.

Up to and including 300 mm Joists, 350 mm channels, and below sections using materials confirming to IS:2062 Notes : '(1) Welding weights, connections, bolts and nuts, anchor bolts shall not be measured for payment, but the cost of which shall be deemed to have been included in the rate. '(2) All holes will be made by drilling only. Gas cutting of holes will not be permitted. '(3) Electrodes manufactured by M/s. ADOR, ESAB, Indian Oxygen and D&H SECHERON or equivalent make shall be used. '(4) Edges of plates shall be grinded to uniform smooth finish. '(5) Full length welding shall be carried out as directed by the EIC.

Providing Structural steel work in M.S Plain Plates and chequrred Plates for Embedded Parts, Trench Covers, Connection plates etc.including cutting, hoisting, fixing in position and applying a priming coat of approved zinc chromate steel primer etc.including cost of structural steel Plates, welding all labour charges etc. complete as per drawings and specifications confirming to IS:2062 Notes : '(1) Welding weights, connections, bolts and nuts, anchor bolts shall not be measured for payment, but the cost of which shall be deemed to have been included in the rate. '(2) All holes will be made by drilling only. Gas cutting of holes will not be permitted. '(3) Electrodes manufactured by M/s. ADOR, ESAB, Indian Oxygen and D&H SECHERON or equivalent make shall be used. '(4) Edges of plates shall be grinded to uniform smooth finish. '(5) Full length welding shall be carried out as directed by the EIC.

Providing and fixing at all levels MS bolts including nuts and washers of approved size, quality and make as per requirements and as per specifications, drawings complete all as directed at site by the Engineer in charge. Note : The erecetion of bolt shall be accurate to permissible tollerence as per relevant code of BARC specification.

Fixing in position in RCC / masonry / formwork mild steel or stainless steel fabricat edembedded parts supplied by the Department including transporting from the departmental stores, aligning/welding fixing in position, providing necessary supporting arrangement etc. complete all as per drawings and specifications at all levels and as directed by the Engineer in charge.

Weighing Up to 100 kg

Weighing above 100 kg to 1000 Kg

Providing and constructing brick work in Cement mortar C.M 1:6 using crushed sand using standard bricks of approved class/ quality, make or brand in foundation and plinth including curing, raking out joints, simultaneous pointing below plinth level if specified, complete as per drawings, specifications and as directed by the Engineer-in-charge.

Providing and constructing Brick work in cement mortar 1:6 Using river sand using Standard bricks of approved quality / class, make / brand in super structure above plinth at all heights / Foundation for Ramp in all shapes and sizes including curing, raking out joints complete as per specifications

Providing 20mm thick waterproof plastering in cement mortar 1:3 (using river sand) finsihed smooth with a floating coat of neat cement including approved waterproofing compound added @2% by weight of cement or as per manufacturer's specifications, sieving of sand to required fineness, preparation of surface, scaffolding at all heights, curing all as per specifications, drawings and as directed at site.

Dismantling of RCC works carefully manually without damaging adjacent structures including cutting of reinforcement including stacking of steel reinforcement bars and disposal of unserviceable materials within 200 m lead as per direction of Engineer-in-charge

Dismantling plain cement concrete manually / by mechanical means carefully without damaging adjacent structures including disposal of debris within 200 m lead as per direction of Engineer-in-charge

Supplying, cutting to shape and fixing specified diameter HDPE Pipe as per IS 4984 of size 160 OD x PE 100 x PN 6 in RR Masonry/ RCC walls in raft as embedded parts complete all as per drawings and as specified at site.

160 mm dia OD HDPE Pipe

Providing, supplying and laying of Brick Soling with well burnt bricks including preparation of bed necessary with brick joints properly filled in and packed with powdered earth and including necessary cushion of similar material below the soling complete as per direction. Soling or dry pavement with one brick-on-edge laid in herring bone pattern (Thickness 125 mm) over consolidated base.

Providing and laying 50 mm thick cement concrete flooring and skirting with concrete hardner topping under layer 38 mm thick cement concrete 1:2:4 and top layer 12 mm thick wearing surface with metallic floor hardner, cement being mixed with metallic floor hardner of approved quality and make in the ratio of 4:1 (4 cement and 1 metallic floor hardner) by weight and this cement hardner compound mixed with 6 mm down graded stone aggregate in the ratio of 1:2 by volume including providing and fixing 30 X 3mm glass strip,This includes cost of cement slurry, finishing to the required finishing and cleaning neatly while handing over the areas etc. complete as per specifications and drawings.

Providing and applying / injecting general purpose, high flow, Class A, non-shrink grout having high flowability through voids, bottom of base plate, tie rod hole and/or gap of min. 10 mm up to 100 mm, by mixing potable water, in a controlled manner by forced-action mixer, in the range of min. 2.9kg to max. 4.1kg per 20 kg bag of grout depending on the required consistency including cost of materials, labour, equipment, tools & tackles and consumables etc. all as per manufacturer's specification and as directed by Engineer-in-charge. Technical parameters: (i) Compressive strength (as per AS 1478.2) in the range of min. 60 MPa to 75 MPa at 28 days depending upon consistency of the grout mix. (ii) Felxural strength (as per AS 1012.11) min. 13 MPa at 28 days, (iii) Indirect tensile strength (as per AS 1012.10) min. 6 MPa at 28 days, (iv) setting time (as per AS 1012.18) - Initial Setting Time min. 5.5 hours and Final Setting Time max. 7.5 hours (v) Flow characteristics (as per AS 1478.2): 400-600mm (Flow Trough) and 25-30 seconds(Flow cone). Rate will be inclusive of mixing, pouring, curing as per manufacture's specification, including scaffolding, complete all as per specifications and as directed by Engineer-in-charge. Note : Tentative / suggested make for guidance of bidder(s) : Conbextra GP2 Grout of M/s FOSROC or approved equivalent make.

S. GHOSH & ASSOCIATES PVT. LTD.

SEKAR CONSTRUCTIONS