Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore Link ((full)) Jun 2026

The installation of jacked foundation piles involves driving or jacking the piles into the ground using a hydraulic jack or a pile driving rig. The piles are typically installed in a sequence, starting from the center of the pile group and working outward. The installation process should be monitored closely to ensure that the piles are installed at the correct angle, depth, and alignment.

GeoSS emphasizes several operational standards to ensure structural integrity and efficiency:

Unlike driven piles, jacked piles cause minimal disturbance to surrounding structures, making them ideal for: Urban infill projects. Retrofitting existing buildings. The installation of jacked foundation piles involves driving

: Operators maintain jacking pressure until the pile hits practical refusal at the target stratum. Pressure Recycling : Once reached, Pjcap P sub j

Although focused on bored piles, the 2025 limestone guidelines illustrate how GEOSS-led collaborative frameworks establish industry best practices. Key features include: Pressure Recycling : Once reached, Pjcap P sub

: Eliminates the risk of tensile cracks or structural damage to the pile head that typically occurs under high-impact traditional hammer driving.

In soft ground, displacement from jacked piles can cause soil heave or damage to adjacent structures. Pre-boring or relief holes may be necessary in these conditions. Soil Strata: Risk Mitigation and Instrumentation

: Piles should never have their alignment adjusted by force during the installation process.

The penetration or residual settlement during the holding period must not exceed the minor thresholds defined by the project's qualified professional (QP). Risk Mitigation and Instrumentation