annual plan-pbp 2025-26 aanthattakulam drainage construction, chengottukavu gp-drainage-general civil work- 1 drainage construction 2 11.1.1.1:excavation for structures
earthwork in excavation for structures as per drawing and technical specifications clause 305.1 including setting out, construction of shoring and bracing, removal of stumps and other deleterious material and disposal upto a lead of 50 m, dressing of sides and bottom and backfilling in trenches with excavated suitable material.
i. ordinary soil
(i) upto 3 m depth 3 3.14:construction of subgrade and earthen shoulders
construction of subgrade and earthen shoulders with approved material obtained from borrow pits with all lifts and leads, transporting to site, spreading, grading to required slope and compacted to meet requirement of table 300.2 with lead upto 1000 m as per technical specification clause 303.1. 4 od287731/2025-2026: filling with quarry muck filling up low lying and water logged areas with local material/ quarry muck, spreading in layers, leveling the top at site and consolidation by ramming, etc complete for improving the cbr value of subgrade 5 11.4.1.1:providing concrete for plain/reinforced concrete in open foundations complete as per drawings and technical specifications clause 802, 803, 1202 & 1203
i. p.c.c grade m 10
(i) nominal mix 1:3:6 6 11.4.2.1:providing concrete for plain/reinforced concrete in open foundations complete as per drawings and technical specifications clause 802, 803, 1202 & 1203
ii. p.c.c grade m 15
(i) nominal mix (1:2.5:5) 7 12.5.3:plain/reinforced cement concrete in substructure complete as per drawings and technical specification clauses 802, 804, 805, 806, 807, 1202 ans 1204
for height upto 5 m
iii. r.c.c grade m 20 8 11.8:supplying, fitting and placingtmt bar reinforcement in foundation complete as per drawings and technical specifications clauses 1000 and 1202 9 75.8.1.1:providing plain/reinforced concrete(1 cement:2 fine aggregate: 4 course aggregate) forsubstructure as per drawings and technical specifications clause 802, 803, 1202 & 1203as required including compaction, finishing and tamping etc .complete. max. size ofcourse aggregate not exceeding 25mm , mixed in concrete mixer etc complete as perspecification (i) nominal mix (1:2:4)