| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. Scope of Piling | |||
| A1 | Pile type specified — Bored cast-in-situ / Driven precast / CFA / Micropile Acceptance: Pile type clearly stated with justification (e.g., 'Bored BCIS — soil type suitable for bentonite support'); typical pile type in India is bored BCIS for medium-strong soils | IS 2911 Part 1 Clause 3 (Pile classifications) | OK NC NA HOLD |
| A2 | Number of piles — Total piles and distribution across site Acceptance: Total pile count stated (e.g., 48 piles); distribution on plan referenced; pile load sharing verified by structural engineer | Structural design compliance | OK NC NA HOLD |
| A3 | Diameter and depth range — Min and max pile diameter (mm) and depth (m) Acceptance: Diameter range stated (e.g., 600–800 mm); depth range (e.g., 15–22 m); depth variation due to site topography noted | IS 2911 Part 1 Clause 4 (Design) | OK NC NA HOLD |
| A4 | Total piling length and design capacity — Cumulative length and per-pile working load Acceptance: Total concrete volume estimate (e.g., 850 m³); per-pile working load range (e.g., 1500–2500 kN); capacity justification from geotechnical report | Project scheduling and capacity planning | OK NC NA HOLD |
| A5 | Pile layout reference drawing — Structural drawing showing pile locations, IDs, and cap details Acceptance: Pile layout drawing referenced (e.g., 'Struct. Drawing S-02 Rev. 3'); pile IDs (P1, P2, etc.) matched; pile cap details (tie beams, pile spacing) understood | Design compliance | OK NC NA HOLD |
| B. Reference Documents | |||
| B1 | IS codes referenced — IS 2911 Part 1, IS 456, and all applicable parts Acceptance: IS 2911 Part 1 (bored piles), Part 2 (driven precast), Part 3 (CFA), Part 4 (load testing) as applicable; IS 456 for reinforcement and concrete | Regulatory compliance | OK NC NA HOLD |
| B2 | Geotechnical report — Bearing capacity, stratum profile, water table, soil parameters (c, φ, γ) Acceptance: Report titled, dated, approved; bearing capacity analysis shown; founding stratum identified; soil parameters (cohesion, angle of friction, unit weight) provided; used for pile design | Design basis | OK NC NA HOLD |
| B3 | Structural drawings and pile design calculations — Pile cap design, reinforcement details, load analysis Acceptance: Structural drawings show pile cap design, pile spacing (min center-to-center 2.5× diameter), tie beams; pile design calculations checked and approved by structural engineer | Design compliance | OK NC NA HOLD |
| B4 | Project specifications — Concrete grade, steel grade, curing, testing frequencies Acceptance: Specification document referenced; concrete grade (M25–M35 typical), steel grade (Fe 500D), testing frequencies defined; quality acceptance criteria stated | Quality standards | OK NC NA HOLD |
| C. Materials | |||
| C1 | Concrete grade and mix design — Grade M25–M35 per design, mix design tested Acceptance: Concrete grade M25 minimum for piles (per design); mix design per IS 10262; water-cement ratio ≤ 0.55; cube strength tested at 7 and 28 days; ≥1 set per 50 m³ | IS 456 Clause 5 (Materials) | OK NC NA HOLD |
| C2 | Cement type — Ordinary Portland Cement (OPC) or blended cement per specification Acceptance: OPC 43-grade or 53-grade per contract; blended cement (PPC, PSC) acceptable if specified; cement bag weight (50 kg) and expiry date verified; mill certificates on file | IS 456 Clause 5.2 (Cement) | OK NC NA HOLD |
| C3 | Aggregates — Fine (sand) and coarse (gravel 20 mm) per IS 383, free from contaminants Acceptance: Fine aggregate: zone II or III per IS 383 (fineness modulus 2.5–3.0); coarse aggregate: 20 mm downsize, flakiness index <25%, soundness loss <12%; grading tested per IS 2720 Part 2 | IS 456 Clause 5.3 (Aggregates) | OK NC NA HOLD |
| C4 | Reinforcement steel — Fe 500D (High Strength Deformed) per IS 1786, tested for strength and ductility Acceptance: Fe 500D bars per IS 1786; tensile strength 500 MPa min; ductility (% elongation) ≥14%; mill test certificates on file; visual inspection for corrosion, damage, or bending | IS 456 Clause 5.4 (Reinforcement) | OK NC NA HOLD |
| C5 | Bentonite (for bored piles) — Density 1.03–1.10 g/cm³, marsh funnel viscosity 30–40 sec Acceptance: Bentonite density monitored continuously with Marsh funnel; viscosity 30–40 sec (min 3 tests per day); density recorded in boring log; replacement if viscosity drops below 30 sec | IS 2911 Part 1 Clause 9.1 (Drilling fluid) | OK NC NA HOLD |
| C6 | Polymer admixture (if used) — Type, dosage, and mill certification Acceptance: If polymer used (for water reduction, slump retention), dosage ≤ 1% by weight of cement; manufacturer data provided; testing of concrete slump retention required | IS 456 Clause 5.6 (Admixtures) | OK NC NA HOLD |
| C7 | Casing system — Material (steel), diameter, wall thickness, and condition for temporary/permanent use Acceptance: Temporary casing: steel, min 3 m or through fill; permanent casing: per design (e.g., 400 mm OD × 6 mm for soft soil); casing inspected for splits, dents, corrosion; threads cleaned before assembly | IS 2911 Part 1 Clause 8 (Equipment and materials) | OK NC NA HOLD |