Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore

The Geotechnical Society of Singapore (GEOSS) establishes guidelines to ensure safety, quality, and efficiency in pile installation. This article outlines the GEOSS good practices for installing jacked foundation piles within Singapore's unique geological framework. 1. Understanding Jacked Foundation Piles

GeoSS recommends achieving two consistent sets before final termination. 4. Ground Monitoring and Mitigation

It is considered good practice to conduct probe holes at every pile or pile group location to determine the precise depth and size of any cavities or soft layers, ensuring the pile terminates in competent strata.

For the most current regulatory requirements, practitioners should refer to the latest BCA circulars and GeoSS publications available on the BCA and GeoSS websites. For the most current regulatory requirements

Project parties must submit in a timely manner the following documents in the issued by the Commissioner of Building Control together with the Notice of Approval for the first piling plan:

Short piles occur when a pile cannot be jacked to the required depth due to unexpected obstructions or variable ground conditions. The risk of short piles is heightened in areas with limestone cavities or boulders. Mitigation measures include:

Maintained load tests are conducted on selected working piles to verify that settlement at design load and test load matches acceptable structural limits. Integrity Testing (PIT) For the most current regulatory requirements

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 Building and Construction Authority (BCA) updated these requirements as of September 1, 2022. Guidelines for ST Plan Applications

Never adjust a pile’s alignment by force during the jacking process; this can compromise the structural integrity of the pile. Strategic Jacking Sequence: For large pile groups, always work from inside out For the most current regulatory requirements

: This article is for informational purposes only and does not constitute professional engineering advice. All geotechnical and structural works must be carried out by qualified professionals in accordance with applicable Singapore laws, regulations, and codes of practice.

: Engineers must review deep borehole logs to identify soil stratigraphy, groundwater levels, and the depth of the founding stratum (such as the Kallang Formation or Old Alluvium).

Jacking continues until "practical refusal" is reached, indicating that the pile tip has successfully entered the intended bearing stratum.