Tungabhadra Board Tender

Providing Dam body grouting, PICC pointing to upstream;Drilling vertical (and if required inclined upto 10 degrees) holes in masoanry/concrete Dam body and Hard rock, from top of dam for body grouting with diamond drills ('BX' or nearest available size) and after washing holes, and re-drilling wherever required, including labor charges, machinery, air, water, etc. (excluding cost of core box) with stage height of 3 to 5m intervals or as directed by the Engineer including cost of all materials, hire charges of machinery, labor charges and any other incidental charges, (This includes drilling for NOF portion of dam involving two vertical rows from dam top i.e. First row at 2 m from dam u/s face at 3 m c/c and Second row at 1.5 m distance d/s of first row at 3 m c/c staggarded to first row towards. All holes drilled minimum 2 m into the foundation rock.) etc., complete as per specifications and as directed by the Engineer-in-Charge from Ch.88 Mtr to 613.560 Mtrs (upto 30 to 60 meter depth)

Providing Dam body grouting, PICC pointing to upstream;PERMEABILITY TEST- In situ tests - Conducting field permeability tests in bore holes of various depths at different elevations of average 3 to 5 m interval, applying pressure as decided by the Project Manager. (both ascending and descending) etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Cement grouting with stage grouting at 3 to 5 m intervals or as directed in the vertical drilled/inclined holes in the main dam , from top of dam (after completing cleaning the holes with air and water loss testing) starting from the bottom of drill hole using packers with Cement grout /grout mix under a maximum pressure as per specification/ codes/direction of the Project Manager and thickening the grout mix as required (as per specification/appropriate methods) by using admixture for increasing workability, including cost of all materials, hire charges of machinery, labor, platforms, scaffolding costs on conveyance between holes for any other items not covered in item no. 2) and any other incidental charges, etc. complete as directed by the Project Manager. etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Supplying M.S core boxes with 150x60x10cm with 7 inside compartments and hinged top cover with locking arrangements and 2 Nos. handle on sides, using 2mm thick M.S plate and 30x5mmM.S flats including cutting, shaping, welding, applying a coat of iron primer after scrapping and cleaning, painting with 2 coats of synthetic enamel paint, painting bore hole details and name scheme on both sides of lid for identification, etc. complete and measures in weight of the box (For 5% of drilling length) etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Capping and covering the grout holes at dam top (after the drilling and grouting work is over) using M15 grade of concrete along with water proofing admixture to prevent ingress of rain water , to the desired depth etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Raking, cleaning and pointing on upstream face of Masonry dam joints with UV resistant, anti-shrink and high strength materials like cements using crystalline technology (CT)/ Polymer/ Equivalent cementitious materials conforming to BIS/EN-1504-3, Class R4 (2014) standard for masonry joint filling to a depth of 5 cm including preparing of ?T? joint of masonry by removing of existing loose portion of stone masonry by breaking (using manual / mechanical means ) removing existing embedded M.S. bar, racking out the masonry joints to required depth, cleaning with special chemicals and air water jet under pressure for removing algae/ fungi, applying bond coat before repair material application and top coat after finishing, complete as per specification including cost of all materials, machinery, labour, scaffolding, hire charges of cranes, insurance charges transportation with all leads and lifts and any other incidental charges etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Filling the deeper cavities or loose material area inside the masonry joints which are beyond 5cm and upto 30 cm using cementitious 1:3 (1 of OPC 53 grade cement, 3 of fine sand) cement mortar mixed with water proofing admixture (having 28th day compressive strength of more than 7.5N/mm2) inside the masonry joint upto 30 cm depth (underneath the top 5cm depth meant for pointing), using raking tools, complete as per specification including cost of all materials, machinery, Curing, labour, electricity, scaffolding, hanging platform, pullys, hire charges of cranes, all relevant safety equipments, insurance charges, transportation with all leads and lifts and any other incidental charges as directed by Project Manager. (Work will be measured and paid based on Weight of cement used in 1:3 cement sand mortar filling). etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Pack grout filling the internal porous cavities greater than depth of 30cm and upto 1 metre deep in the RR masonry: Treating the internal cavities greater than a depth 30cm and upto 1 metre deep in the masonry using injection pressure grouting to reduce the porosity of the masonry by drilling hole of 12.5 mm/25mm dia and 200mm deep and fixing PVC nozzles in triangular pattern. Minimum 3 nos of PVC nozzles shall be fixed per 1 sqm of the upstream area for grouting. Grouting the deep cavities inside the masonry joint using Polycementitious materials or equivalant having High strength, quick setting, zero shrink cementetious grout/ along with plasticized, expanding-non shrink grout admixture under required consistency by using 40 psi grouting pump. The grouting material shall give a minimum compressive strength of 35N/mm2 in 28 days when cube tested .All works Complete using all relevant safety equipments with all lead and lifts complete as per specification including cost of all materials, machinery, labour, electricity, scaffolding, hanging platform, pullys ,hire charges of cranes,curing, all relevant safety equipments, insurance charges, transportation with all leads and lifts and any other incidental charges .{Work will be measured and paid based on weight of cement and cementitiousmixture (without water) used} etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Carrying out treatment at vertical contraction/Block joints as detailed below:a)   Racking out the Block Joint/ Contraction Joint material completely upto a depth of minimum 150mm from U/S to remove the deteriorated existing system and thoroughly cleaning the surface of the joint to remove all the loose particles, fungus and scale formation by using Air blower & Water jet pressure.b)  Insertion of compressible Hydrophilic material - to be pushed into contraction joint from upstream side of dam and sealed by inserting compressible hydrophilic backup material which fits into the groove completely. Hydrophilic material shall be filled to a depth of minimum 100 mm.c)   Filling the joint by Polyurethane Sealant material upto and above the upstream surface level starting from the finished hydrophilic material surface.d)  Application of Adhesive and fixing minimum 2mm thick and minimum 150mm wide water resistant, UV resistant TPE (Thermo plastic elastomer)/EPDM based joint tape designed for water tightness of expansion and construction joints whichever as specified by the Project Manager on upstream surface of the Contraction joint. etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Reaming of porous drainage holes: Reaming or pressure jet flushing of porous drain holes in non-overflow and overflow using contractors own diamond drill apparatus in concrete/masonry/rock diven by diesel motor with single tube, flexible rod, inclusive of all incidental charges, cost of spares/materials, consumables, other materials required for the work and also labour charges for operation, cleaning the drainage holes etc. transportation charges for machinery and shifting the same to different location etc, hire charges of equipments, fuel, labour with all leads and lift, etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Reaming/Redrilling of foundation drainage holes: Reaming/Redrilling and pressure jet flushing of existing vertical/incined drainage holes of 3 inch diameter inside the foundationgallery using diamond drill bit of suitable size, diamond reamer shell with using hydraulically operated rotary core drilling equipments, rods of suitable length, fixing PVC pipes with caps, inclusive of all machineries, equipments, consumables, other materials required for the work and also labour charges for operation, cleaning the drainage holes etc. transportation charges for machinery and shifting the same to different location etc, hire charges of equipments, fuel, labour with all leads and lift, etc., complete as per specifications and as directed by the Engineer-in-Charge

Providing Dam body grouting, PICC pointing to upstream;Cleaning drainage gallery, adits, instrumentation galleries etc., by scrubbing / brushing including chiselling and removing leached lime deposit and disposing off all the waste material out side adits in specified location as directed with all leads and lifts etc., complete as per specifications and as directed by the Engineer-in-Charge