Rigs must undergo a regular maintenance regime with daily, monthly, and yearly checklists to ensure they remain in peak condition. 2. Installation Procedures and Sequence

The installation process must comply with and specific local good practices.

Successful installation begins with a thorough understanding of the site’s soil profile to prevent damage to adjacent structures.

For large pile groups, jacking should proceed from the inside out or in a consistent direction (e.g., left to right) to manage ground displacement.

Continuous checks on pile verticality are essential throughout the installation.

If termination criteria are met but the pile is significantly shorter than the design depth, the designer must assess if the shallower depth is acceptable. 4. Quality Control and Safety

Adjacent jacking actions can cause previously installed piles to heave, potentially separating the pile base and losing end bearing. Monitoring for heave is critical, and measures like pre-boring or relief wells should be used if necessary.

Effective measures, such as warning signs and restricted access, must be implemented to keep personnel away from the test area while loading is in progress.

If penetrating consolidating soft soil, designers must account for potential downdrag forces (negative skin friction) that may reverse the direction of force in the long term. 3. Termination and "Set" Criteria In Singapore, piles are typically jacked with a force ( Pjcap P sub j

Designers are encouraged to conduct adequate site investigations, including probe holes at every pile group location to detect potential voids or cavities.