Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore !!top!! Jun 2026

Jacked piles are displacement piles —they squeeze soil sideways, which can uplift previously installed piles (especially in marine clay).

According to the GeoSS draft guidelines, several proactive measures should be implemented to mitigate the adverse impacts of ground movement: Jacked piles are displacement piles —they squeeze soil

6.4 Data Management and Reporting

This is the core of the "Good Practice" guide, covering: | | Long pile rows (e

| Site Condition | Recommended Sequence | |----------------|----------------------| | Single isolated pile | No special sequence. | | Group of piles (≤9) | Center-outwards or spiral. | | Long pile rows (e.g., for retaining walls) | Staggered, with pre-drilled pilot holes (50–70% pile diameter) to reduce displacement. | | Adjacent to MRT / existing building | Install “sacrificial” or “guard” piles first, then inner piles. Use extremely low jacking rates (<5 mm/s). | | | Long pile rows (e.g.