Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore Repack Jun 2026
In Singapore, jacked piles are particularly advantageous in with nearby structures and sensitive residents. The jacked piling system uses dead weights to exert hydraulic pressure to push piles into the ground, producing less noise and vibration compared to driven piles, making it suitable for projects in urban areas where residents are sensitive to noise and vibrations.
All pile foundations in Singapore must be designed with a to ensure structural resilience and public safety.
to govern the successful installation of jacked foundation piles within the country's highly variable geology . Jacked piling, also known as jacked-in or hydraulic displacement piling, offers a noise-free and vibration-free alternative to traditional driven piles. This makes it a popular choice for high-density urban developments in Singapore. However, because they are displacement piles, their design and execution must strictly comply with Eurocode 7 (EC7) and local Building and Construction Authority ( BCA ) circulars to mitigate risks like ground movement, pile heave, and premature termination.
Do you need detailed calculations for ? Share public link In Singapore, jacked piles are particularly advantageous in
): The pile is jacked into the ground with a force adjusted in steps, usually reaching a value of .
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The jacking process subjects the pile to high compressive stresses. The designer must ensure that the precast concrete pile has adequate structural strength to withstand not only the expected superstructural loads but also the loads and stresses arising from handling and installation. Pile sections must be designed to resist buckling, especially in very soft soil layers where lateral support is minimal. to govern the successful installation of jacked foundation
| Defect | Likely Cause | GEOSS Recommended Action | | :--- | :--- | :--- | | Sudden drop in jacking force (≥20%) | Pile fracture or soft pocket | Stop, extract if possible, install replacement pile. | | Refusal above design depth (≥1 m) | Boulder / old timber pile | Use pre-boring (300 mm dia.) to 500 mm below refusal depth, then re-jack. | | Excessive heave (>25 mm) | Rapid jacking in clay | Restrike all piles within heave zone after 7 days. | | Verticality drift > 1:100 | Inclined bedrock or poor jig | Install raking micro-piles as supplement. |
. The Geotechnical Society of Singapore (GeoSS) has established several good practices for their installation and testing. Key Installation Practices Machine Capacity
: The pressure gauges and load cells of the hydraulic jacking rig must possess valid calibration certificates from an accredited laboratory in Singapore. This ensures that the pressure readings accurately reflect the actual load applied to the pile. However, because they are displacement piles, their design
The purpose of certification of Specialist Builders for Piling Works is to ensure the installation process of specialist piling works conforms to standards or other normative documents and/or general requirements. The field of specialist piling works covers installation of various types of piled foundations and retaining walls comprising piles.
To ensure that driven or jacked piles are installed properly, a as tabulated in Appendix A of the circular is adopted. Depending on the classification of the building, requirements include:
This paper covers good practice for jacked precast concrete (spun pile) and steel pipe piles (driven/jacked hybrid) with working loads up to 3000 kN.