NHIDCL/RO-Agt/STMC/K - A/2025-26/773

Excavation for Structures Earthwork in excavation for structures as per drawing and MoRT&H technical specifications Clause 304 including setting out, construction of shoring & bracing, removal of stumps & other deleterious material and disposal upto a lead of 50 m, dressing of sides & bottom and backfilling in trenches with excavated suitable material. 1. Ordinary Soil A. By Manual Means (iii) 3m to 6m depth

PCC 1:3:6 in foundation PCC 1:3:6 in foundation: Plain cement concrete 1:3:6 nominal mix in foundation( using jhama brick aggregate ) 40mm nominal size mechanically mixed, placed in foundation and compacted by vibration including curing for 14 days as per drawings & MoRT&H technical specifications Clauses 2100 (including centering, shuttering, staging etc. but excluding reinforcement)

M30 in Foundation Plain / Reinforced cement concrete in open foundation as per drawings & MoRT&H technical specification Clauses 1500, 1700 & 2200. (including centring, shuttering, staging etc. but excluding reinforcement). 1. With Batching Plant, Transit Mixer and Concrete Pump

M30 in Stem Plain / Reinforced cement concrete in substructure complete including formworks as per drawings & MoRT&H technical specification Clauses 1500, 1700 & 2200. (including centring, shuttering, staging etc. but excluding reinforcement). 1. With Batching Plant, Transit Mixer and Concrete Pump A. For Height above 5m upto 10m

TMT Reinforcement Supplying, fitting & placing Thermo- Mechanically treated bar / cold twisted deformed steel bar in foundation complete as per drawings & MoRT&H technical specification Clauses 1600

Weep Hole Providing weepholes in brick masonry / stone masonry, plain/ reinforced concrete abutment, wing wall, return wall with 100 mm dia AC pipe or PVC pipe ( 110 mm OD of 6.0 Kg/cm2 ptressure ) extending through the full width of the structures with slope of 1(V):20(H) towards drawing face complete as per drawing and MoRT&H technical specification clauses 2700 & 2200.

Filter Media Providing & laying filter media with jhama brick aggregates as per specification to a thickness of not less than 600 mm with smaller size towards the soil & bigger size towards the wall & providing over the entire surface behind abutment, wing wall, return wall to the full height, compacted to firm condition complete as per drawing and MoRT&H technical specification clause 2504.2.

Backfilling Backfilling behind abutment, wing wall & return wall complete as per drawings, clause 710.1.4 of IRC:78 & MoRT&H Technical Specification Clause 2200 a) by Sandy Material

Granular Sub-base with Well Graded Material (Table 400.1): (B) Plant Mix Method: Construction of granular sub-base by providing well graded material, mixing in a mechanical mix plant at OMC, carraige of mixed material to work site upto lead of 1000 m spreading in uniform layers with motor grader on prepared surface and compacting with smooth wheel roller to achieve the desired density , complete as per MoRT&H Technical Specification Clause 401. (i) For Grading I Material

Dry Lean Cement Concrete Sub-Base : Construction of dry lean cement concrete Sub- base over a prepared sub-grade with coarse and fine aggregate conforming to IS: 383, the size of coarse aggregate not exceeding 25 mm, aggregate cement ratio not to exceed 15:1, aggregate gradation after blending to be as per table 600-1, cement content not to be less than 150 kg/ cum, optimum moisture content to be determined during trial length construction, concrete strength not to be less than 10 Mpa at 7 days, mixed in a batching plant, transported to site, laid with a paver with electronic sensor, compacting with 8-10 tonnes vibratory roller, finishing and curing as per MoRT&H specification clause 601.