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: Used to demonstrate the quality and durability of piles as finished products.
The circular was designed to supersede the earlier Advisory Note 1/03 and to align local practices with the Eurocode framework, particularly Eurocode 7 (EC7) on geotechnical design. It became effective for all structural plans submitted on or after 1 April 2017, and it remains a cornerstone of foundation verification in Singapore today.
As sea levels rise and extreme weather events become more frequent, foundation design must adapt. GEOSS guidelines are expected to evolve to address:
RLT serves as a verified alternative to conventional SLT, offering efficiency without compromising reliability. In Singapore’s local practices, RLT results are typically interpreted using the to subtract inertia and damping effects, deriving equivalent static load-displacement curves. Calibration tests have been conducted on bored piles embedded in sedimentary rock formations (Jurong Formation) to validate RLT against static load test results. : Used to demonstrate the quality and durability
For a verified deep dive, these documents serve as the primary sources for GeoSS standards: Joint Circular (BCA/IES/ACES/GeoSS): Covers the Performance-Based Pile Design procedure GeoSS Guidelines on Good Practices for Pile Load Test: The definitive guide for Kentledge system setups BCA Geotechnical Briefings: Detailed guidance on ground investigations and EC7 compliance summarized checklist
Based on the title structure and the terminology used, this refers to a technical paper published by the of the Geological Society of Singapore (GEOSS) .
Global codes classify soil by grain size (sand, silt, clay). GEOSS adds a mandatory overlay: genesis. As sea levels rise and extreme weather events
: Specialist builders must declare and document all working load tests, including failures, to auditors to maintain certification.
The new GEOSS guidelines do not replace national codes. Instead, they act as a using four layers of earth observation:
: Where possible, Kentledge-type load tests should be set up at a distance of at least one times the least width of the Kentledge footprint away from public access areas or neighbouring structures. Calibration tests have been conducted on bored piles
The GeoSS guidelines integrate directly with the design philosophies of . This shifts design focus entirely onto safety, serviceability, and durability limits. Standardized Parameter Sets
While "Verified" is sometimes part of a specific presentation title, the core publication is widely cited in Singapore's construction industry. The most prominent paper covering these guidelines is:
