Geoss Good Practice For Installation Of Jacked Foundation Piles In — Singapore

Continuous checks on pile verticality are essential throughout the installation.

Successful installation begins with a thorough understanding of the site’s soil profile to prevent damage to adjacent structures. The load is then released and reapplied to measure the "set"

Jacking continues until practical refusal is reached. The load is then released and reapplied to measure the "set". The load is then released and reapplied to measure the "set"

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. The load is then released and reapplied to measure the "set"

Current standards emphasize performance-based design where designers review instrumented Ultimate Load Test (ULT) results to verify design parameters.

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

The stability of the jacking machine must be verified, especially on soft ground. Specialist builders must maintain high-capacity rigs; for example, G3 category specialists require rigs with a minimum 400-ton counterweight .