Once refusal is reached, it is recommended to release the pressure to zero and then immediately re-apply the load without a pause to check the pile capacity. 4. Quality Control and Compliance
In Singapore, the pile is typically jacked into the ground with the force, Pjcap P sub j Once refusal is reached, it is recommended to
To satisfy both Eurocode 7 standards and local building controls, the pile layout and structural integrity must remain within rigorous geometrical boundaries: Applies to jacked piles installed without excavation
| | Requirement / Purpose | | :--- | :--- | | BS EN 12699:2015 | Execution of special geotechnical works – Displacement piles. Applies to jacked piles installed without excavation. | | Eurocode 7 | Geotechnical design principles for pile capacity and structural integrity. | | BCA Circular APPBCA-2022-15 | Requirements and guidelines for driven or jacked piles, including heave monitoring and risk-based approaches. | | CP4 | Pile designs must satisfy safety factor against failure, settlement limits, and adequate structural capacity for installation forces. | | BCA/IES/ACES/GEOSS Circular 2016 | Mandates ground investigation, load tests, and quality control for building foundations, with specific testing frequencies and safety factors. | | | CP4 | Pile designs must satisfy
Urban density in Singapore demands construction methods that minimize environmental disturbance. Traditional impact pile driving causes significant noise and vibration, making it unsuitable for projects near sensitive structures, MRT lines, or residential zones. Jacked foundation piles have emerged as a preferred solution. As a silent and vibration-free piling technology, hydraulic jacking presses piles into the ground using deadweight resistance. However, success relies heavily on strict adherence to engineering standards. The Geotechnical Engineering Office and Specialist Trade Contractors in Singapore emphasize utilizing a Geotechnical Engineering Operational Safety System (GEOSS) framework to ensure safety, quality, and structural integrity during installation. Understanding the GEOSS Framework