All jacked piles must be . The test load is limited by the maximum safe operating ram pressure of the ram, the available dead load of the existing foundation, or the structural capacity of the foundation, whichever is less.
| Standard | Title | |----------|-------| | | Geotechnical design – General rules | | BCA “Piling” CP 4 (historical reference) | Still referenced for workmanship | | SS EN 12699 | Execution of special geotechnical works – Displacement piles | | LTA Civil Design Criteria | For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 | All jacked piles must be
In Singapore, the pile is typically jacked into the ground with the force, Pjcap P sub j Unlike impact-driven piles, jacked piles are inserted into
Jacked piles, or jack-in piles, are displacement piles installed using a hydraulic jacking system. Unlike impact-driven piles, jacked piles are inserted into the ground with a quasi-static force, offering a significantly quieter and vibration-free installation process. This makes them the preferred choice for projects near sensitive structures, such as hospitals, schools, and residential estates, where noise and vibration limits are strictly enforced. Their use is supported by a robust regulatory framework aimed at preventing common issues like short piles and pile heave, particularly in Singapore’s thick soft clay deposits. The initial pile segment is loaded into the
The initial pile segment is loaded into the hydraulic clamping jaw.