The draft guidelines for jacked foundation piles emphasize that their popularity in
In thick layers of soft ground, jacked piles (being displacement piles) can cause lateral soil movement. In such cases, pre-boring or relief holes may be necessary to protect adjacent structures. 4. Regulatory Compliance & Quality Control The draft guidelines for jacked foundation piles emphasize
PIRs and summary sheets must be endorsed by the RE within 24 hours and available for audit. Regulatory Compliance & Quality Control PIRs and summary
Never adjust a pile’s alignment by force once installation has begun. The draft guidelines for jacked foundation piles emphasize
| Test | Requirement | |------|-------------| | | 1% of piles, up to 1.5× working load (max 2.0× for proof test) | | PDA / high-strain dynamic test | 5% of piles (correlated with jacking records) | | Sonic logging (for large diameter >400 mm) | If specified by design | | Heave monitoring | 2–3 benchmarks near pile group |
Determining when to stop jacking (the "Set") is the most critical aspect.