| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. Scope of Excavation | |||
| A1 | Excavation description — Type, location, dimensions clearly stated Acceptance: Document must specify: excavation for foundation pit / basement / trench / utility crossing; plan area (m²); depth below ground level; volume estimate (m³) | IS 3764 Clause 4 (General requirements) | OK NC NA HOLD |
| A2 | Soil type from investigation report — Classification per IS 2720 Part 2 Acceptance: Soil classification (clay / sand / gravel / rock) taken from geotechnical report; stratum thickness and depth to water table stated; safe slope angle determined per IS 3764 Table 1 | IS 3764 Clause 5.1 (Site investigation data) | OK NC NA HOLD |
| A3 | Purpose of excavation — Foundation / basement / trench / utility stated clearly Acceptance: Purpose determines depth, slope angle, and support system; e.g., shallow foundation pit vs. deep basement requiring bracing | IS 1904 Clause 2.1 (Classification of foundations) | OK NC NA HOLD |
| B. Reference Documents | |||
| B1 | IS codes referenced — IS 3764, IS 1904, IS 2720, and project specifications Acceptance: All applicable IS code editions listed; project-specific specifications and approved drawings referenced; site-specific limitations noted (e.g., proximity to existing structures) | Regulatory compliance | OK NC NA HOLD |
| B2 | Geotechnical investigation report — Reference and approval date Acceptance: Report title, reference number, approval date stated; bearing capacity, settlement analysis, slope stability conclusions extracted | IS 1892 compliance | OK NC NA HOLD |
| B3 | Approved drawings — Structural foundation plan, site layout, excavation limits Acceptance: Architectural and structural drawings referenced by revision; foundation pit extent, depth, and final levels marked; utility positions shown | Design compliance | OK NC NA HOLD |
| C. Materials and Equipment | |||
| C1 | Excavation equipment — Type, capacity, and specifications stated Acceptance: Excavator make/model/bucket capacity; dumper capacity; crane capacity (if used); mobile phones for communication; equipment must be certified for onsite use | Safe excavation practice | OK NC NA HOLD |
| C2 | Dewatering equipment — Pump capacity (if needed), sump pit design, monitoring Acceptance: Pump capacity (m³/hr) sufficient for expected water inflow; sump pit size (min 1.5 m³); wellpoint system or open sump specified; discharge location approved | IS 3764 Clause 8 (Dewatering) | OK NC NA HOLD |
| C3 | Shoring material — Type (steel / timber / diaphragm wall) for slopes >1.5 m depth Acceptance: For vertical or near-vertical sides >1.5 m: steel sheet piling / soldier piles with lagging / timber props; design calculations provided; props spaced per design | IS 3764 Clause 7 (Support systems) | OK NC NA HOLD |
| C4 | PCC for blinding — Grade (typically M10), thickness ≥75 mm Acceptance: PCC M10 for blinding; minimum 75 mm thick; placed after final excavation trimming and geotechnical approval; cube samples tested | IS 456 Clause 5 (Materials) | OK NC NA HOLD |
| C5 | Survey instruments — Level, theodolite for setting out and monitoring Acceptance: Level and theodolite available onsite; survey crew identified; bench marks established; daily level monitoring of excavation base | Accurate excavation control | OK NC NA HOLD |