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| Sr No | Corrigendum Date | Corrigendum | Type | New Submission Date |
|---|---|---|---|---|
| 1 | 20-02-2026 | CORRIGENDUM-I | Date | 26-02-2026 |
| Sl. No. | Item Description |
| 1 | Mobilization |
| 2 | Mobilization, transportation, erection, commissioning and demobilization of all plants, equipment and resources required for construction of diaphragm wall, complete as per SAIL or DSP tender specifications and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes mobilization and deployment of all construction equipment necessary for diaphragm wall works, including hydraulic grab or trench cutter, crawler crane, service crane, slurry mixing, storage and circulation plant, desanding and recycling unit, slurry tanks, bentonite silos, pumps, tremie pipes, concrete placing accessories, generators, welding sets, air compressors, lighting arrangements, survey instruments, safety equipment, tools, tackles and all other ancillary equipment required for complete execution. The item includes transportation of all plants and equipment to site, unloading, assembly, erection, calibration, trial runs and commissioning to achieve full operational readiness. It includes shifting and relocation of plants and equipment within the site or plant premises as required during execution and complete demobilization after completion of works. The scope also includes deployment of operators, drivers, mechanics, helpers and supervisory staff, supply of fuel, lubricants, consumables, spares, routine servicing, breakdown maintenance and standby arrangements. It includes obtaining and maintaining all statutory approvals, permits, insurance and compliance with plant safety rules. The item includes providing temporary sheds, storage areas, access preparation, internal roads if required, power and water arrangements, lighting, barricading and establishment of quality control and testing facilities for slurry and concrete. The rate includes all labour, supervision, accommodation, handling, rehandling, transportation, all leads and lifts, taxes, duties, insurance, overheads and all incidental expenses required to make the complete diaphragm wall system fully ready for execution under running plant conditions. No separate payment shall be made for multiple mobilisations, extended standby, equipment idle time, restricted access, interruptions, night working, shift wise working or any delay arising from execution inside operating plant premises. Payment under this item shall be made only after commencement of diaphragm wall works and after complete mobilization, assembly, erection and commissioning of all plants, equipment, accessories and ancillary systems required to execute the work in all respects. Mere receipt of equipment at site, partial mobilization or equipment kept in standby condition shall not be eligible for any payment. No payment shall be admissible for idle, standby or non operational equipment under any circumstances.The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 3 | RCC Guide wall |
| 4 | Providing and constructing RCC guide walls for diaphragm wall works, complete as per approved drawings, specifications, method statement and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope includes survey, setting out of diaphragm wall alignment and marking of panel layout. It includes excavation of guide wall trench in ordinary soil, removal of vegetation and debris, dressing of sides and bottom, shoring or strutting wherever required, dewatering, and stacking or disposal of excavated material within a lead of 100 m. Disposal of surplus excavated material within plant premises up to a lead of 5 km is fully included. The item includes providing and laying PCC levelling course or lean concrete wherever required. It includes providing, fixing, aligning and removing centering, shuttering or formwork with all strutting, bracing and supports. It includes providing and laying RCC guide walls of required dimensions suitable for diaphragm wall thickness, including supply of all materials, batching, mixing, placing, compaction by vibration, finishing, curing and protection. Making of pockets, openings, chamfers, rebates and provision of embedded sleeves or inserts as shown in drawings or required for execution is included. Removal of formwork after the specified period without damaging concrete is included. The scope includes deployment and operation of all required plants and machinery, tools and tackles, handling and shifting within site, quality control, measurements and records for line, level, alignment, thickness, concreting and curing. It includes safety arrangements, barricading, lighting, housekeeping and compliance with plant safety rules and permit systems while working inside running plant premises. The rate includes all labour, supervision, materials, PCC and RCC, shuttering and formwork, plants and machinery, tools and tackles, handling, rehandling, transportation, all leads and lifts, taxes, duties and all incidental expenses required for completion of guide wall works in all respects. No separate payment shall be made for variation in soil condition, depth of excavation, dewatering effort, working height, access restriction, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 5 | Providing and laying cast in situ reinforced cement concrete of specified gradefor diaphragm wall guide walls, complete as per approved drawings, specifications and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of all materials by the contractor including cement, fine aggregate, coarse aggregate of 20 mm and down graded size, water and approved admixtures where required. It includes batching and mixing in approved mixer or batching plant, transportation to site, placing, laying and compaction by mechanical vibration, finishing of exposed surfaces, formation of construction joints where required, curing for the specified period and protection of green concrete. The item includes providing pockets, openings, recesses, chamfers, rebates and embedded sleeves or inserts, dowels, starter bars and fixtures as shown in drawings or required for execution. It includes maintaining required line, level, alignment, dimensions and tolerances and making good of edges, corners and surfaces to the satisfaction of Engineer in Charge. The rate includes all labour, supervision, tools and tackles, plants and machinery, scaffolding or working platforms, consumables, sampling, testing and quality control, handling, rehandling, transportation, shifting within site, all leads and lifts and all incidental expenses required for completion of the work in all conditions including restricted access and live plant operation. Reinforcement steel and centering or shuttering shall be measured and paid separately under relevant BOQ items unless specifically stated otherwise. No separate payment shall be made for variation in pour size, location, working hours, interruptions, idle time or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 6 | Grade of Concrete M 25 |
| 7 | Grade of Concrete M 30 |
| 8 | Grade of Concrete M 35 |
| 9 | Grade of Concrete M 40 |
| 10 | Supplying, fabricating and placing in position high yield strength deformed steel reinforcement bars of grade Fe500D or Fe550 as specified, conforming to relevant IS standards, for RCC guide wall works, complete as per approved drawings, bar bending schedule and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of reinforcement steel by the contractor, transportation to site or fabrication yard, unloading, stacking, straightening, cleaning and de coiling where required. It includes cutting, bending and shaping to required lengths, hooks, cranks and bends, and providing laps, anchorage and development length strictly as per drawings and specifications. Welding shall be carried out wherever specified, including supply of welding sets, electrodes, power and consumables. The item includes placing reinforcement in position with specified cover using approved cover blocks, chairs, spacers, separators and supports. It includes tying at all intersections with binding wire to maintain correct spacing, alignment, line and level during concreting. It includes fabrication and fixing of reinforcement for corners, junctions, openings, pockets, dowels, starter bars and embedded items, including all necessary tying or welding. The scope includes maintaining reinforcement position during concreting and making all adjustments or corrections required to achieve specified tolerances. Any deformation, displacement or damage shall be rectified at contractor’s cost. The rate includes all labour, supervision, tools and tackles, cutting and bending charges, welding sets and consumables, binding wire, cover blocks, chairs, spacers, handling, rehandling, transportation, shifting within site, all leads and lifts, compliance with plant safety rules, permit systems, restricted access conditions and all incidental expenses required for completion of the work in all conditions. No separate payment shall be made for variation in bar diameter, quantity, congestion, working height, access difficulty, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 11 | Diaphragm Wall |
| 12 | Excavation of diaphragm wall trench of width 800 mm to 1200 mm in all types of soil strata up to the approved founding or termination level, complete as per approved construction drawings, specifications and latest relevant IS Standard or equivalent applicable standard. The work shall be executed entirely inside a running shop or Continuous Casting Plant (CCP). The scope includes setting out of diaphragm wall alignment, panel layout and reference controls. Excavation shall be carried out by hydraulic grab or trench cutter with all required cranes, accessories and support equipment. Required line, level, verticality and dimensional tolerances shall be achieved and maintained at all times, and any correction or re excavation shall be at contractor’s cost. The item fully includes supply, operation and maintenance of polymer or bentonite slurry support system for trench stability, including mixing, circulation, storage, desanding or recycling, testing and continuous control of slurry properties such as density, viscosity, pH and sand content. Any variation in soil strata, groundwater conditions, slurry consumption, slurry loss, contamination, replacement or additional treatment shall be deemed included. The scope also includes dewatering, groundwater control, cleaning of trench bottom, removal of loose or collapsed material and achieving specified founding level in all conditions. All excavated or bored soil or spoil generated from diaphragm wall trench excavation, piling, boring or any associated activity is fully included in this item. This includes temporary stacking/ disposal within plant or site premises at approved locations, safe heap formation, barricading, dust suppression, rehandling, loading by mechanical or manual means, transportation through approved routes and final disposal outside the project area at contractor’s arranged dumping location. All leads, lifts, royalties, permits, taxes, unloading, spreading or levelling at disposal yard and complete site cleaning after removal are included. The item also includes execution inside running plant premises with live equipment and restricted access conditions. It includes compliance with plant safety rules, permit systems, shift wise or time bound working, night working if required, standby of manpower and machinery, repeated mobilisation or demobilisation, protection of existing structures, utilities and services, coordination with plant authorities and other agencies, traffic management, safety arrangements, barricading, lighting and complete housekeeping. All labour, supervision, tools, tackles, plants and machinery, fuel, consumables and statutory compliances are included. Measurement for payment shall be from EGL top of guide wall to diaphragm wall termination level only. No separate measurement or payment shall be made for soil type, depth variation, groundwater condition, slurry usage, disposal distance, operational constraints, restricted access, interruptions, idle time, rework or change in methodology. The rate shall be inclusive of all incidental expenses required for completion of the work in all respects. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 13 | 800 mm thick diaphragm wall |
| 14 | 1000 mm thick diaphragm wall |
| 15 | 1200 mm thick diaphragm wall |
| 16 | Providing and laying cast in situ reinforced cement concrete of specified grade for 800 mm to 1200 mm thick diaphragm wall panels by tremie pipe method under polymer or bentonite slurry, complete as per approved construction drawings, specifications, IS 9559 and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of all materials by the contractor including cement, fine aggregate, coarse aggregate of 20 mm and down graded size, water and approved admixtures. It includes design mix concrete, production, batching and mixing at approved batching plant, transportation by transit mixers, and delivery at site in specified time limits. Concrete shall be provided with required slump or slump flow suitable for tremie concreting and maintained throughout the pour. The item includes providing, installing, handling and operating complete tremie system including tremie pipes, hopper, joints, clamps and accessories. It includes continuous and uninterrupted placement of concrete through tremie pipe, maintaining required embedment in fresh concrete at all times, controlled lifting or withdrawal of tremie, prevention of segregation, contamination or slurry ingress, maintaining specified panel top level, and correction of any defects at contractor’s cost. The item fully includes removal and disposal of contaminated concrete or slurry mixed concrete from top portion, finishing of top surface to required level, curing, protection and safeguarding of freshly cast panels. Any loss of concrete, additional consumption, rejected concrete, re concreting, interruption in pour, delay due to plant conditions or restricted access shall be deemed included. The rate includes all labour, supervision, tools, tackles, tremie system, plants and machinery, fuel, consumables, handling, shifting within site, compliance with plant safety rules, permits, barricading, lighting, housekeeping, sampling and testing of concrete including slump or slump flow tests and cube casting, transportation, all leads and lifts and all incidental expenses required for completion of the work in all conditions. Cost of reinforcement steel, formwork, guide walls and stop ends shall be paid separately under relevant BOQ items unless specifically stated otherwise. No separate payment shall be made for variation in depth, thickness, slurry condition, concrete grade, admixture dosage, working hours, night work, standby, interruptions or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 17 | Grade of Concrete M 25 |
| 18 | Grade of Concrete M 30 |
| 19 | Grade of Concrete M 35 |
| 20 | Grade of Concrete M 40 |
| 21 | Supplying, batching and applying approved integral crystalline waterproofing admixture to the entire quantity of concrete before pouring into diaphragm wall panels, complete as per manufacturer’s recommendations, tender specifications, approved drawings and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of approved integral crystalline waterproofing admixture by the contractor, storage, protection and handling at site, and dosing strictly as per manufacturer’s specified quantity per cubic metre of concrete. It includes accurate measurement and controlled addition of the admixture at the batching plant or through transit mixer to ensure uniform dispersion throughout the concrete. Addition shall be completed prior to placement and shall be compatible with tremie concreting requirements, including maintenance of specified workability and slump or slump flow. The item includes provision of all labour, supervision, tools and tackles, calibrated measuring and dosing arrangements, quality control checks and batch wise monitoring. It includes submission and maintenance of manufacturer’s product data sheets, approvals, batch wise consumption records, delivery challans, test certificates and any testing or documentation required under specifications or directed by Engineer in Charge. Measurement for payment shall be based on the total quantity of concrete in cubic metre treated with the admixture for diaphragm wall works. The rate includes all leads and lifts, transportation, handling, wastage, repeat dosing if required, execution under restricted access and live plant conditions, standby if required and all incidental expenses necessary for completion of the work in all conditions. No separate payment shall be made for variation in dosage, concrete grade, depth of placement, slurry condition, working hours, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 22 | Supplying, fabricating and placing in position high yield strength deformed steel reinforcement bars (SAIL make) of grade Fe550D or as specified, conforming to IS 1786 and tender specifications, for diaphragm wall reinforcement, complete as per approved construction drawings, bar bending schedules and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of reinforcement steel by the contractor, transportation to site or fabrication yard, straightening, cleaning, de coiling where required, cutting, bending and shaping to required lengths, hooks, cranks and bends. It includes providing laps, anchorage and development length strictly as per drawings and specifications. Welding shall be carried out wherever specified, including supply of electrodes, power, consumables and testing if required. The item includes fabrication of panel wise reinforcement cages comprising main bars, distribution bars, links, stiffeners, bracings and all secondary steel necessary for rigidity and handling. It includes tying and binding of reinforcement at all intersections with approved binding wire. It includes supply and fixing of spacer wheels or centralizers, chairs, separators, supports and cover blocks to maintain specified cover, alignment and position throughout handling and concreting. The scope also includes fixing of inserts, lifting hooks, spacers and temporary stiffeners for safe handling. Reinforcement cages shall be tagged and marked panel wise. The item includes lifting, shifting, tilting and lowering of cages into the trench using cranes, positioning to correct line, level and cover, and securing the cage against displacement, distortion or floating during tremie concreting. Any deformation, damage or misalignment shall be rectified at contractor’s cost. The rate includes all labour, supervision, tools, tackles, cutting and bending charges, welding sets, power, consumables, binding wire, cover blocks, spacer wheels or centralizers, handling, rehandling, transportation, shifting within site, all leads and lifts, compliance with plant safety rules, permit systems, restricted access conditions, standby and repeated mobilisation if required, and all incidental expenses necessary for completion of reinforcement work in all conditions. No separate payment shall be made for variation in bar diameter, quantity, congestion, cage weight, depth of placement, working hours, night work, interruptions, restricted space, execution inside running plant premises or any rework. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 23 | Supplying, transporting, handling and fixing in position approved PVC water stopper or water bar at diaphragm wall panel joints, complete as per approved drawings, specifications and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of PVC water stopper of approved make, type and size as specified. It includes cutting to required lengths, forming bends, junctions and intersections wherever required, and fixing centrally at panel joints to the correct line, level and alignment. The water stopper shall be securely tied or held with reinforcement using binding wire, clamps or approved fixtures to prevent any displacement during reinforcement cage lowering and tremie concreting. The item includes jointing of water stopper by heat welding or vulcanising strictly as per manufacturer’s recommendations to achieve continuous and fully watertight joints. It includes protection of water stopper from damage during handling, shifting, cage lowering, concreting and subsequent operations. Continuity and position of water stopper at all joints shall be checked and ensured before and during concreting. Any damage, misalignment or discontinuity shall be rectified at contractor’s cost. The rate includes all materials, labour, supervision, tools and tackles, jointing or welding equipment, power, consumables, handling, rehandling, transportation, shifting within site, all leads and lifts, compliance with plant safety rules, permit systems, restricted access conditions and all incidental expenses required for completion of the work in all conditions. No separate payment shall be made for variation in joint length, joint configuration, working depth, access difficulty, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 24 | Supplying and fixing in position thermocol protective cover with 3 mm to 5 mm thick plywood cover over exposed reinforcement or dowel bars provided for basement slab, complete as per consultant’s drawings, specifications and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope includes cutting and shaping of thermocol sheets to required size and profile to suit reinforcement or dowel bar layout. It includes supply and fixing of 3 mm to 5 mm thick plywood cover boards over thermocol. The protective cover shall be fixed and secured properly over exposed reinforcement or dowel bars to prevent damage, bending, misalignment, corrosion, cement slurry ingress and displacement during concreting and subsequent works. Fixing shall include tying, taping, nailing, screwing and provision of supports or stiffeners as required to ensure stability. The item includes protection of covers during execution, removal and refixing wherever necessary due to sequencing of works, and final removal after completion of related concreting operations. Any damage to reinforcement or dowel bars due to improper protection shall be rectified at contractor’s cost. Supply of dowel bars or mechanical couplers shall be provided by the Client free of cost as per consultant drawings. All other materials required for protection works are included in this item. The rate includes all labour, supervision, tools and tackles, plywood, thermocol, fixing accessories, consumables, handling, rehandling, transportation, shifting within site, all leads and lifts, compliance with plant safety rules, permit systems, restricted access conditions and all incidental expenses required for completion of the work in all conditions. No separate payment shall be made for variation in number of bars, bar diameter, working height, access difficulty, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 25 | Stacking, loading, transportation and disposal of bored or excavated soil generated from diaphragm wall trench excavation, piling, boring and all associated works, complete as per directions of Engineer in Charge. The scope includes temporary stacking of excavated or bored soil at locations outside the site or plant premises. The location for stacking and disposal shall be selected and arranged by the Bidder at its own cost. The Bidder shall maintain safe heap slopes, provide barricading, dust suppression and environmental control measures, and carry out rehandling wherever required. The item includes loading of soil into tippers or dumpers by excavator or manual means, transportation through approved routes, and final disposal outside the project area at the Bidder’s arranged dumping location. The scope includes unloading, spreading or levelling at the disposal yard, and cleaning of stacking and loading areas after removal. All leads and lifts are included. The scope also includes payment of royalty, permits, statutory fees, taxes, gate passes, transport permissions and compliance with local authority requirements. The rate includes all labour, supervision, tools and tackles, plants and machinery, fuel, consumables, traffic management, safety arrangements, handling, rehandling, transportation and all incidental expenses required for completion of the work in all respects. No separate payment shall be made for distance, quantity variation, rehandling, multiple stacking, traffic restrictions, waiting time, night work or any regulatory requirement. The rate shall be final and binding. No extra claim shall be entertained on any account whatsoever. |
| 26 | Providing, supplying, handling, fixing, holding in position and removal or extraction of stop ends for diaphragm wall panel construction, complete as per approved drawings, specifications, method statement and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes stop end pipes, stop end shutters or bulkheads of approved type, shape and size suitable for the specified diaphragm wall thickness. It includes all accessories such as guide frames, clamps, brackets, spacers, supports, lifting hooks, alignment devices and any temporary fixtures required to maintain correct line, level, verticality, tightness and stability during trench excavation and tremie concreting. Any correction, refixing or replacement required to achieve proper positioning shall be at contractor’s cost.Panel wise stop end requirement shall be deemed fully included in the quoted rate as follows.A) For primary panels, fixing of two numbers stop ends per panel including alignment, holding during excavation and concreting and subsequent extraction.B) For secondary panels, fixing of one number stop end per panel including alignment, holding during excavation and concreting and subsequent extraction.C) For closing panels, no stop end shall be provided and no separate payment shall be admissible on this account.The item fully includes checking and maintaining proper joint formation and interlock between adjacent panels, prevention of slurry leakage, extraction of stop ends after initial setting of concrete without damaging green concrete, cleaning, repair and preparation of stop ends for reuse, cleaning and preparation of joint faces for subsequent panel construction, removal of slurry cake or laitance at joint interface, and disposal of all waste materials generated. The rate includes all labour, supervision, tools, tackles, cranes or handling equipment assistance, consumables, welding or cutting if required, handling, rehandling, shifting within site, compliance with plant safety rules, permit systems, barricading, lighting, records, working under restricted access conditions, all leads and lifts and all incidental expenses required for completion of the work in all conditions. No separate payment shall be made for variation in panel size, depth, wall thickness, joint condition, slurry properties, extraction difficulty, reuse cycles, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 27 | Providing complete watertight treatment for all penetrations through diaphragm wall, including Cost of Steel items, materials like sleeves, inserts, embedded plates, pipe penetrations and openings, to ensure permanent leak proof performance, complete as per approved drawings, specifications, manufacturer recommendations and directions of Engineer in Charge. The diaphragm wall shall be treated as a permanent underground wall forming part of an underground pit, chamber and pump room. The item includes identification, preparation and cleaning of all penetration locations, sleeves and inserts prior to sealing. It includes supply and application of approved watertight sealing systems suitable for permanent underground construction, such as non shrink grout, crystalline waterproofing mortar, hydrophilic strips, sealing compounds, collars, clamps or proprietary systems as approved. All materials used shall be compatible with concrete, reinforcement and groundwater conditions. The scope includes sealing around sleeves and inserts on all sides, filling of annular gaps, compaction and finishing of sealing material, and protection during curing. The sealing shall be continuous, durable and capable of resisting groundwater pressure without cracking, debonding or deterioration. All joints between diaphragm wall panels, sleeves and inserts shall remain fully watertight. The item includes inspection, testing and rectification of any leakage, seepage or dampness observed during or after execution. Any repair, re sealing or additional treatment required to achieve complete watertightness shall be carried out by the Bidder at no extra cost. The rate includes all materials, labour, tools, tackles, consumables, handling, transportation, working platforms, safety arrangements, execution inside running plant premises, all leads and lifts and incidental expenses required to achieve complete leak proof conformity in all respects. No separate payment shall be made for number of penetrations, size of sleeves, depth of wall, groundwater condition, additional sealing measures or repeated treatments. No leakage, seepage or dampness through wall surfaces, joints, inserts or sleeves shall be permitted. No extra claim shall be admissible on any account whatsoever. |
| 28 | Chipping & Capping of Beam Work |
| 29 | Chipping of RCC guide wall on one side only for diaphragm wall works, complete as per directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope includes chipping and removal of concrete from one face of existing or newly constructed guide wall by chiselling or approved mechanical means to the required width, depth and profile necessary for diaphragm wall execution. It includes removal of laitance, loose, weak or defective concrete, thorough cleaning of the exposed surface, trimming and making edges true, straight and even, and making good any local defects or uneven portions to achieve the required profile and tolerance. The item fully includes provision of all labour, supervision, tools and tackles, hand tools or mechanical chipping equipment, necessary scaffolding or working platforms, safety arrangements, barricading, lighting and compliance with plant safety rules and permit systems. It includes collection, handling, loading, transportation and disposal of all chipped concrete debris to designated locations within plant premises, and cleaning of the work area after completion. The rate includes execution under restricted access conditions, live plant operation, repeated mobilisation if required, all leads and lifts, handling, rehandling, transportation, housekeeping and all incidental expenses required for completion of the work in all conditions. No separate payment shall be made for hardness of concrete, thickness variation, working height, access difficulty, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 30 | Chipping and trimming of diaphragm wall concrete to the required profile and level, including removal of excess lean concrete and weak or contaminated concrete, without disturbing or damaging the main reinforcement, complete as per approved drawings, specifications and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope includes controlled chipping by manual chiselling or approved mechanical means. It includes removal of laitance, slurry mixed concrete, loose, honeycombed or unsound concrete and trimming to the specified cut off level, line and profile. Exposed reinforcement shall be cleaned by wire brushing and washing to remove adhered concrete, slurry or rust while ensuring bars remain intact, straight and undamaged for lapping, welding or coupler connections. Any damage to reinforcement due to improper execution shall be rectified at contractor’s cost. The item includes making the concrete surface sound, clean and ready for subsequent concreting, capping beam construction or connection works. It includes provision of necessary working platforms or scaffolding, compliance with plant safety rules, permit systems, safety arrangements, barricading and lighting. The scope also includes collection, handling, loading, transportation and disposal of all chipped concrete debris, waste lean concrete and slurry contaminated material to designated locations within plant premises, and cleaning of the work area after completion. The rate includes all labour, supervision, tools and tackles, chipping equipment, consumables, handling, rehandling, transportation, shifting within site, all leads and lifts, execution under restricted access and live plant conditions, standby if required and all incidental expenses necessary for completion of the work in all conditions. No separate payment shall be made for hardness or strength of concrete, depth of chipping, working height, access difficulty, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 31 | Providing, fixing, aligning, supporting and removing centering and shuttering or formwork for RCC capping beam works of diaphragm wall, complete as per approved drawings, specifications and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of all shuttering and formwork materials such as steel plates or plywood, runners, walers, soldiers, props, scaffolding, staging, clamps, bolts, ties, wedges, supports and all accessories required for complete formwork system. It includes fabrication, erection and fixing of formwork to the required shape, size, line, level and plumb. Provision of chamfers, fillets, grooves, rebates, pockets, openings, inserts, sleeves, dowels, anchor bolts and construction joints as shown in drawings or required for execution is fully included. The item includes application of approved shuttering oil, sealing of joints to prevent leakage of cement slurry, grout or water, and providing adequate bracing, staging and supports to safely withstand fresh concrete pressure, vibration, working loads and site constraints. Alignment, rigidity and stability of formwork shall be maintained throughout concreting and any correction required shall be at contractor’s cost. The scope also includes removal and stripping of formwork after the specified period without causing damage to concrete edges, corners or surfaces. It includes cleaning, handling, shifting and stacking of formwork materials for reuse or removal. Any repair to concrete surfaces arising from formwork defects shall be deemed included. The rate includes all labour, supervision, tools and tackles, scaffolding and staging, consumables, shuttering oil, handling, rehandling, transportation, shifting within site, all leads and lifts, compliance with plant safety rules, permit systems, restricted access conditions, barricading, lighting, housekeeping and all incidental expenses required for completion of the work in all conditions. No separate payment shall be made for variation in beam size, height, depth, curvature, working height, access difficulty, congestion of reinforcement, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 32 | Supplying, transporting, unloading, stacking, straightening, cleaning, cutting, bending, fabricating and placing in position high yield strength deformed steel reinforcement bars of grade Fe550D conforming to IS 1786, of various diameters, for RCC works, complete as per approved drawings, Bar Bending Schedule and directions of Engineer in Charge. The work shall be executed inside a running shop or CCP without shutdown and under all operational constraints. The scope fully includes supply of reinforcement steel by the contractor, handling at site or fabrication yard, straightening and de coiling where required, removal of rust, mill scale or surface impurities, cutting and bending to required shapes, hooks, cranks, bends and lengths. It includes providing laps, anchorage and development length strictly as per drawings and specifications. Welding shall be carried out wherever specified, including supply of welding sets, power, electrodes and consumables. The item includes assembling and fabrication of reinforcement comprising main bars, distribution bars, stirrups, links, binders and all secondary steel necessary for proper fixing. It includes placing reinforcement in correct position with specified cover, fixing cover blocks, chairs, spacers, separators and supports, tying at all intersections with approved binding wire, and maintaining correct spacing, alignment, line and level during concreting. Any adjustment, correction or refixing required to achieve compliance shall be at contractor’s cost. The rate includes all labour, supervision, tools and tackles, cutting and bending charges, welding sets and consumables, binding wire, cover blocks, chairs, spacers, handling, rehandling, transportation, shifting within site, all leads and lifts, compliance with plant safety rules, permit systems, restricted access conditions, standby, repeated mobilisation if required and all incidental expenses necessary for completion of reinforcement work in all conditions. No separate payment shall be made for variation in bar diameter, quantity, congestion, working height, access difficulty, interruptions, idle time, night work or execution inside running plant premises. The rate shall be final and binding. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 33 | Providing, supplying and laying cast in situ reinforced cement concrete of specified grade conforming to latest IS:456 for tie beams and connected beams, in all respects, complete as per approved drawings, specifications and direction of Engineer-in-Charge. The item includes supply of all materials by the Contractor including cement, fine aggregate, coarse aggregate (20 mm and down graded), water and approved admixtures if required, design mix concrete, batching and mixing in approved batching plant/mixer, transportation to site, placing in position at all levels and heights, laying to required line, level and dimensions, and compaction by mechanical vibration to achieve dense concrete, complete. The item also includes finishing of exposed surfaces as specified, providing construction joints wherever required, curing for the specified period, protection of green concrete, and making good of edges and surfaces, complete. Rate shall include all labour, tools, tackles, plants and machinery, fuel, consumables, handling, transportation, all leads and lifts, testing and quality control (slump and cube tests), supervision and incidental expenses required for completion of the work. Reinforcement steel and centering/shuttering shall be measured and paid separately under relevant items unless specifically included in BOQ. No extra claim shall be entertained on any account whatsoever. |
| 34 | Grade of Concrete M 25 |
| 35 | Grade of Concrete M 30 |
| 36 | Grade of Concrete M 35 |
| 37 | Grade of Concrete M 40 |
| 38 | Providing and executing connection of new diaphragm wall with existing underground scale fume tunnel wall, complete as per approved drawings, specifications and directions of Engineer in Charge, ensuring structural continuity and permanent watertight performance. The item includes detailed survey and marking of connection locations, controlled chipping, hacking and trimming of existing tunnel wall concrete to expose sound concrete and reinforcement, cleaning of surfaces by wire brushing, air or water jetting, and preparation of joint faces. It includes drilling and fixing of dowel bars, starter bars, mechanical couplers, shear connectors or embedded plates as specified, using approved bonding agents, epoxy or non shrink grout. The scope includes forming construction joints and interfaces, providing and fixing inserts, sleeves and openings required at the connection zone, and sealing of all joints and gaps using approved waterproofing systems suitable for permanent underground construction to achieve leak proof continuity. Any adjustment or modification required to suit actual site conditions shall be deemed included. The item includes execution under restricted access and running plant conditions, providing all labour, supervision, tools, tackles, drilling equipment, bonding and sealing materials, handling, transportation, working platforms, safety arrangements, barricading and all incidental expenses required for completion of the work in all respects. The rate shall be inclusive of all leads and lifts and all measures necessary to achieve a sound, durable and watertight connection between the existing scale fume tunnel wall and the new diaphragm wall. No extra claim, compensation or extension of time shall be admissible on any account whatsoever. |
| 39 | \"NOTE:-THE ABOVE RATE SHALL BE INCLUSIVE OF ALL TAXES & DUTIES, ROYALTIES, CESS, FEE, ENVIORMENTAL & POLLUTION, FITNESS & SAFETY CLEARANCE CHARGES (IF ANY), OR ANY OTHER INCIDENTAL CHARGES ETC BUT EXCLUDING GST.\" |
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