IS 2911:2013 Part 4 is the Indian Standard (BIS) for design and construction of pile foundations - testing of piles. This part of IS 2911 prescribes methodologies for conducting initial and routine load tests on pile foundations. It establishes the procedures for vertical compression, lateral, and pull-out tests, along with the detailed interpretation criteria for deriving safe working loads from load-settlement data.
Specifies methods for testing of piles, including routine load tests, initial load tests, and integrity tests, to verify their load-carrying capacity and structural integrity.
Overview
- Status
- Current
- Usage level
- Frequently Used
- Domain
- Geotechnical — Bridges and Bridge Engineering
- Type
- Testing Method
Also on InfraLens for IS 2911
Practical Notes
! Ensure the reaction frame or kentledge capacity is at least 1.25 times the maximum anticipated test load for safety.
! Always place dial gauges symmetrically around the pile to average out the effect of pile head rotation or tilting.
! The pile head must be properly chipped and capped with strong concrete or structural steel plates to ensure purely axial load transfer without eccentricity.
Frequently referenced clauses
reinforced concretesteelsoilrock
International Equivalents
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International Comparison — Coming Soon
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Key Values6
Quick Reference Values
Routine Test Load (Vertical)1.5 times the estimated safe load
Initial Test Load (Vertical)2.5 times the estimated safe load
Minimum rest period (Bored Cast-in-situ)28 days
Safe Load Settlement Criterion (< 600mm dia)Load at 12 mm total settlement
Safe Lateral Load CriterionLoad at 5 mm deflection at pile head
Number of Dial Gauges (Vertical Test)Minimum 3, preferably 4
Key Formulas
Safe Load = Two-thirds of final load at which total displacement attains a value of 12 mm (for piles < 600mm dia)
Safe Load = 50 percent of the final load at which total displacement is 10 percent of pile diameter (for piles >= 600mm dia)
Tables & Referenced Sections
Key Tables
Table 1 - Minimum Time for Pile Testing
Key Clauses
Clause 5 - Test Equipment
Clause 6 - Preparation of Pile for Test
Clause 7.1 - Vertical Load Test (Compression)
Clause 7.2 - Lateral Load Test
Clause 7.3 - Pull-out Test
Clause 8 - Assessment of Safe Load
Frequently Asked Questions4
What is the difference between an initial test and a routine test?+
Initial tests are done on test piles to establish safe load capacity (tested up to 2.5x safe load or failure). Routine tests are done on working piles to validate design and workmanship (tested up to 1.5x safe load).
How is the safe lateral load determined?+
It is typically taken as the load corresponding to a 5 mm deflection at the cut-off level of the pile.
How many dial gauges are required for a vertical compression test?+
A minimum of three, but preferably four dial gauges positioned at equal distances around the pile.
When can pile testing commence after casting a bored cast-in-situ pile?+
Testing can commence a minimum of 28 days after casting to ensure the concrete has gained sufficient strength.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.