IS 2911 Part 1 Section 1 governs driven cast in-situ concrete piles. Part 1 is split by pile type — Section 1 driven cast in-situ, Section 2 bored cast in-situ, Section 3 driven precast, Section 4 bored precast — and you must apply the section matching the actual pile. Driven CIS piles are formed by driving a casing/tube and concreting in place; they suit soils where displacement and a clean shaft are achievable and where bored-pile spoil/slurry is undesirable.
Key Requirements
•Use the section of IS 2911 Part 1 matching the pile type — Sec 1 = driven cast in-situ (don't apply bored-pile provisions to a driven pile or vice-versa)
•Pile-type selection driven by soil profile, groundwater, loads, vibration constraints and adjacent structures
•Driven piles displace soil (densify granular soils, but can heave/disturb sensitive clays and nearby works)
•Read with the geotechnical investigation (IS 1892) and the structure code (IS 456 for the pile concrete)
Reference Tables
IS 2911 Part 1 — sections by pile type
Section
Pile type
Part 1 Sec 1
Driven cast in-situ concrete piles
Part 1 Sec 2
Bored cast in-situ concrete piles
Part 1 Sec 3
Driven precast concrete piles
Part 1 Sec 4
Bored precast concrete piles
Apply the section that matches the pile actually used; Part 3 covers under-reamed piles, Part 4 load testing.
Practical Notes
✓Driven CIS piles densify loose granular soils (a benefit) but can cause heave, vibration and pore-pressure issues in soft/sensitive clays and near existing structures.
✓The pile concrete is still IS 456 concrete — durability, cover and mix design apply, often with marine/aggressive-ground exposure.
Common Mistakes
⚠Applying bored-pile capacity/construction provisions to a driven cast in-situ pile (wrong section).
⚠Ignoring driving-induced heave/vibration effects on adjacent piles and structures.
⚠Designing pile capacity without an adequate geotechnical investigation.