Supply and erection of steel liner grade IS 2062-E450A/BR in central pier and spillway glacis and repairing of spillway glacis, Apron , Guide wall with HPC of Bay 1 , 2 at Dam of Parbati-III Power Station

CIVIL WORKS:

Random Earth filling by excavating all kinds of soil from the surrounding area by mechanical means (Hydraulic excavator) / manual means including getting out the excavated soil for making an embankment for diversion of river through diversion tunnel and for roads, flood banks, marginal banks, and guide banks etc., within a lead upto 50 m.

Making temporary bund at spillway no. 1 & 2 using sand bags

Dewatering of seepage water by electrical dewatering pumps including installation, erection, and shifting of pumps and pipes etc

Demolition/Chipping RCC Work by mechanical mean and stockpiling at designated locations and disposal of dismantled material upto a lead of 1 kilometre stacking serviceable and unserviceable material separately including cutting reinforcement bars.

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 10sqm 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. Hard rock (blasting prohibited)

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.-Ordinary rock

Providing and fixing double scaffolding system (cup lock type) on the exterior side of building/structure, upto 25 metre height, above ground level, including additional rows of scaffolding in stepped manner as per requirement of site, made with 40mm dia M.S. tube, placed 1.5 metre centre to centre, horizontal & vertical tubes joint with cup & lock system with M.S. Tubes, M.S. tube challis, M.S. clamps and staircase system in the scaffolding for working platform etc. and maintaining it in a serviceable condition for execution of work of cleaning and/ or pointing and/ or applying chemical and removing it thereafter. The scaffolding system shall be stiffened with bracings, runners, connecting with the building etc, wherever required, if feasible, for inspection of work at required locations with essential safety features for the workmen etc., complete as per directions and approval of Engineer-in-charge.

Providing and laying High Performance Concrete M65/A20 as per technical specifications, proper compaction, curing including the cost of all materials (including silica fume & super plasticizer), carriages, staging scaffolding and labour etc complete finished item within all leads and lifts

Providing and laying in position machine batched and machine mixed design mix M-25 grade cement concrete for reinforced cement concrete work, using cement content as per approved design mix, including pumping of concrete to site of laying but excluding the cost of centering, shuttering, finishing and reinforcement, including admixtures in recommended proportions as per IS: 9103 to accelerate, retard setting of concrete, improve workability without impairing strength and durability as per direction of Engineer-in-charge. All works above plinth level upto floor V level

Centering and shuttering including strutting, propping etc and removal of form work for : Columns, piers, abutments, pillars, posts and struts.

Centering and shuttering including strutting, propping etc and removal of form work for : For retaining walls, return walls, walls (any thickness) including attached pilasters, buttresses plinth and string course, fillets, kerbs and steps etc.

Steel reinforcement for RCC work including straightening, cutting, bending, placing in position and binding all complete above plinth level :Thermo-Mechanically Treated bars of grade Fe500D or more

Drilling of 32 mm dia holes for 25 mm dia steel anchors and 500mm deep into old concrete by way of jack hammer or other suitable equipment

Steel reinforcement for RCC work including straightening, cutting, bending, placing in position and binding all complete above plinth level - 25 mm dia Tor steel anchors bent in shape for drilled holes of 32 mm. Thermo-Mechanically Treated bars of grade Fe500D or more

Providing and applying of Moisture insensitive epoxy to anchor dowel bar 25mm diameter & 500mm long Fe500 deformed steel bars, embedded in 32 mm diameter holes in the substrata or as shown in the drawings and shall be fixed in place including the cost of all materials, carriage, staging, scaffolding and labour etc. complete finished item and as per the directions of the Engineer-in-Charge. (Excluding cost of drilling and reinforcement)

Providing two components epoxy resin bonding agent with medium viscosity complying with ASTM C-881 (having coverage 2.50 sqm/kg)

Structural repair with Cementitious Mortar (including small cavities 10 to 50 mm deep) in one or two coats complies to or with EN 1504-3 (R4) with Performance Characteristic such as Compressive strength ≥ 45 MPa, Adhesive bond ≥ 2.0 MPa in the concrete of spillway pier walls, retaining wall of stilling basin and like surface ( Up to 4.50 m height from ground floor / ground level) etc complete; including Surface preparation of old concrete by cleaning methods like compressed air/high pressure water blast/sand balast, chipping, wire brush or other means for laying of repair mortar and for all stages and scaffolding as per technical specification as per direction of EIC.

Providing & making Gabion structure with Mechanically Woven Double Twisted Hexagonal Shaped Wire mesh Gabion Boxes as per IS 16014:2012, MORTH Clause 2500, of required size, Mesh Type 10x12 (D=100 mm with tolerance of ± 2%) Zinc coated, Mesh wire diameter 3.0 mm, mechanically edged/selvedged with partitions at every 1m interval and shall have minimum 10 numbers of openings per meter of mesh perpendicular to twist, tying with lacing wire of diameter 2.2mm, supplied @ 3% by weight of Gabion boxes, filled with boulders with least dimension of 200 mm, as per drawing, all complete as per direction of Engineer-in-charge.

Variation in Cement

Variation in silica Fumes

Variation in Super Plasticizer

HYDRO MECHANICAL WORKS:

Providing, Fabrication and installation of 32 mm thick steel liner plate of grade IS 2062- E450A/BR in Spillway Glacis of Dam including rolling to the required radius as per drawing and welding with approved electrode having excellent mechanical properties for heavy joints under restraint and subjected to dynamic loading. (As per tender drawing).

Providing M27 Grade 8.8 fully threaded Anchor minimum length 500 mm, including drilling of hole in 32 mm thick steel liner plate of grade IS 2062-E450A/BR and in HPC and fixing M27 grade 8.8 fully threaded Anchor minimum length 500 mm in hole with Epoxy adhesive having characteristics bond strength of 10 Mpa (minimum) etc, complete in all respect in spillway glacis. (The scope of work i.e. welding on M27 Grade 8.8 fully threaded Anchor and finishing the surface smoothly by grinding are covered in the item of 32 mm thick steel liner plate of grade IS 2062-E450A/BR. (As per tender drawing). (01 set contains 788 nos anchor bolts )

Providing and fixing of 20 mm diameter grout plug with other hardwares complete in all respect. including (a) Drilling of hole in existing concrete or rock or like the surface, (b) Straightening, cutting, bending and placing in position of grout plug (c) Fixing with cement capsule / Cement grouting, etc all complete in spillway glacis. (As per tender drawing). (01 set contains 136 nos grout plugs)

Providing and fixing Torque Controlled Expansion Countersunk Anchor (HSL-4-SK M12) including drilling of hole in 32 mm thick steel liner plate of grade IS 2062-E450 A/BR and M65/A20 HPC or like the surface, vertical wall or like the locations and providing Epoxy adhesive for grouting etc complete in all. (As per tender drawing). (01 set contains 584 nos Counter sunk anchors)

Providing and fixing of 20 mm diameter grout plug with other hardwares complete in all respect. including (a) Drilling of hole in existing concrete or rock or like the surface, (b) Straightening, cutting, bending and placing in position of grout plug (c) Fixing with cement capsule / Cement grouting, etc all complete in spillway glacis. (As per tender drawing). (01 set contains 46 nos grout plugs)

Finishing with Epoxy paint (two or more coats) at all locations prepared and applied as per manufacturer’s specifications including appropriate priming coat, preparation of surface, etc. complete. on steel work