Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore 🎯 Proven

A comprehensive record of all installations, including daily reports, jacking logs, heave monitoring data, and test results, must be maintained. Supervisors must submit interim certificates at defined milestones (e.g., 50% and 100% of pile installation) to the Commissioner of Building Control.

For jacked piles, pre-construction geophysical surveys can identify obstructions that might otherwise cause pile refusal or damage.

: Jacking displaces soil laterally and vertically. In dense clay or silt, this can cause heave. Pre-boring or relief drilling may be required to alleviate excess pore water pressure and ground movement. A comprehensive record of all installations, including daily

Even with a robust plan, unexpected issues can arise. Being prepared is a hallmark of good practice.

Pile heave is a significant concern in soft clay deposits and can reduce a pile's load-bearing capacity. For projects in high-risk categories, heave monitoring of previously installed piles is mandatory during the installation of adjacent piles. This requirement is a key component of the BCA's risk-based approach. : Jacking displaces soil laterally and vertically

Termination is typically based on achieving a specified "set" (a minimum penetration per number of jacking strokes) or a predetermined jacking force, as defined by the design. The piling supervisor must certify that the final criteria are met and that the pile is sound.

A critical aspect of GeoSS practice is the standardisation of pile termination to ensure geotechnical capacity: Jacking Force: The required jacking force ( cap P sub j Even with a robust plan, unexpected issues can arise

The jacked pile method—also known as “jack-in” piling—uses hydraulic jacks to push precast concrete or spun piles into the ground, using the rig’s weight as reaction. Its growing popularity in Singapore stems from two critical advantages: