The Geotechnical Society of Singapore (GeoSS) provides a draft guide for the installation of jacked piles, specifically addressing Singapore practices. GeoSS Guidelines for Jacked Piles
Record digitally every 0.5 m of penetration: The Geotechnical Society of Singapore (GeoSS) provides a
Holding Time: A common practice is to hold the maximum jacking pressure for approximately 30 seconds for at least two cycles to ensure stability. BCA – Code of Practice on Foundations (CP
Introduction
Before commencing the installation of jacked foundation piles, it is essential to conduct thorough site investigations to determine the subsurface conditions, soil properties, and potential hazards. This includes drilling boreholes, conducting standard penetration tests (SPT), and collecting soil samples to determine the soil's geotechnical properties. The site investigation report should provide essential information on the soil's stratigraphy, groundwater levels, and potential liquefaction risks. conducting standard penetration tests (SPT)
✅ Jacking Pressure Monitoring: Real-time monitoring of jacking pressure is essential. The guidelines emphasize the relationship between final jacking force and the required working load to prevent premature termination.
Critical Note: If jacking is interrupted for more than 24 hours in clay, a "breakout force" test must be conducted before resuming.