Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore ((better)) -

| Standard | Title | |----------|-------| | | Geotechnical design – General rules | | BCA “Piling” CP 4 (historical reference) | Still referenced for workmanship | | SS EN 12699 | Execution of special geotechnical works – Displacement piles | | LTA Civil Design Criteria | For transport infrastructure projects |

: All stacking must be completed before the test begins; adding blocks during the loading cycle is prohibited to prevent sudden ground pressure peaks or toppling. Ground Check

Disclaimer: This article provides general guidance on good practices for jacked pile installation in Singapore. It is not a substitute for professional engineering judgement or formal compliance with all applicable regulations, codes, and standards. Practitioners should always consult the latest versions of relevant standards and seek advice from the Building and Construction Authority (BCA) and the Geotechnical Society of Singapore (GeoSS) for project-specific requirements.

Once refusal is reached, it is recommended to release the pressure to zero and then immediately re-apply the load without a pause to check the pile capacity. 4. Quality Control and Compliance | Standard | Title | |----------|-------| | |

GeoSS’s role extends beyond individual guidelines. The society collaborates with BCA, IES, and ACES to produce joint circulars that harmonise industry practice. Recent guidelines for bored piles in limestone areas demonstrate this collaborative approach—co-created with contractors, consultants, specialists, academia, and agencies to ensure a practical and consistent approach across the industry.

: Dead weights must preferably use heavy steel blocks rather than lower-density concrete blocks to maximize structural footprint efficiency.

: Upon completion of piling works, the QP must submit as-built piling plans and certificates of supervision within 28 days to regulatory bodies. Practitioners should always consult the latest versions of

Urban density in Singapore demands foundation solutions that minimize environmental disturbance. Jacked foundation piles have become a preferred choice for urban construction. They offer a low-noise, vibration-free alternative to traditional driven piles.

) for a designated holding time (e.g., 30 seconds) to ensure the tip has stabilized. ⚠️ Key Engineering Risks and GeoSS Mitigations

As a displacement pile, jacked piles cause soil heave—upward movement of the ground surface. This can: Quality Control and Compliance GeoSS’s role extends beyond

Unlike bored piling which generates wet soil slurry, jacked piling displaces soil laterally, keeping the job site dry and reducing waste disposal costs.

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