For more detailed technical requirements, you can refer to these official resources:
| Standard | Title | |----------|-------| | | Geotechnical design – General rules | | BCA “Piling” CP 4 (historical reference) | Still referenced for workmanship | | SS EN 12699 | Execution of special geotechnical works – Displacement piles | | LTA Civil Design Criteria | For transport infrastructure projects |
Termination criteria determine when a jacked pile has reached its required founding depth and capacity. The final jacking force can be smaller than 2.5 times the design load for very long piles, but should be . For more detailed technical requirements, you can refer
: Unexpected cavities or obstructions not identified in site investigation.
: Designers are encouraged to conduct probe holes at every pile or pile group location to identify potential cavities or steeply inclined bedrock that could affect installation success. Load Testing (GeoSS Guidelines) For verification, GeoSS provides specific guidance on Safe Pile Load Testing Using the Kentledge Method Extra Weight : The Kentledge setup should include at least 10% extra weight beyond the required test load (excluding test beams). : Designers are encouraged to conduct probe holes
Common types of jacked piles in Singapore include:
Abstract This paper examines best-practice recommendations—hereafter referred to as “GEOSS Good Practice”—for the installation of jacked foundation piles in Singapore. It synthesizes geotechnical, structural, environmental, and construction-management considerations specific to Singapore’s geology, regulatory context, and urban constraints. Recommendations are practical, prescriptive, and intended for design engineers, contractors, site supervisors, and project owners involved in piled foundation works where jacking (hydraulically driven, displacement or pre-bored) methods are employed. or assist penetration (BS EN 12699).
Jacked piles are —meaning they are installed by forcing soil aside rather than removing it. Displacement piles are defined as piles installed into the ground by driving, jacking, vibration, or screwing, without excavation or removal of materials except to limit heave, reduce vibration, remove obstructions, or assist penetration (BS EN 12699).