Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore !full! May 2026

Mastering the Press: Good Practices for Jacked Piling in Singapore

If vibrations exceed these, GEOSS requires switching to a slurry wall or pre-drilled pilot hole method before jacking. Mastering the Press: Good Practices for Jacked Piling

Appendix B — Example Trigger Levels (typical, to be project-calibrated) Precast concrete piles: Must be designed for eccentric

• Precast concrete piles: Must be designed for eccentric jacking loads. Minimum concrete grade C60/75. Spiral reinforcement is mandatory in the head and toe regions.
• Steel H-piles (e.g., 305x305x223 UC): Must have straightness tolerance of 1:500. Any sweep (bend) >0.5% of length is rejectable.
• Jacking force vs. pile strength: The hydraulic jack capacity must not exceed 80% of the pile’s characteristic compressive strength at the point of application.

9. Summary Checklist for Good Practice

| Item | Action | |------|--------| | Ground truth | Review CPT/boreholes for refusal risk | | Design | Set jacking force ≥1.5× working load | | Equipment | Calibrated jacks, inclinometer, continuous logger | | Sequence | Centre-out, stage loading for sensitive clay | | Monitoring | Heave markers, tilt meters on adjacent buildings | | Testing | Static load test on 1% of piles | | Contingency | Pre-boring plan if refusal encountered | to be project-calibrated)

To ensure the quality of the installed foundation piles, the following quality control and assurance measures should be implemented:

who determines the final penetration depth based on actual site conditions. Integrity Testing