Here is the developed content for a GEOSS (Geo-Engineering Observation & Site Surveillance) Good Practice guide for the installation of jacked foundation piles in Singapore.
This content is structured as a technical bulletin or a section within a site-specific work procedure, aligned with BCA (Building and Construction Authority) requirements and local ground conditions (soft marine clay, Kallang Formation, Old Alluvium). Here is the developed content for a GEOSS
The GEOSS document is not merely a checklist; it is a risk-based methodology. The four foundational pillars are: GEOSS Good Practice for Installation of Jacked Foundation
| Problem | GEOSS Recommended Action | |---------|---------------------------| | Refusal before design depth | Check for boulder; use pre-augering or vibro-displacement. | | Heave of adjacent ground | Reduce jacking rate, install relief holes, or sequence piles from center outward. | | Pile cracking (concrete) | Reduce jacking force; check alignment; use steel shoes. | | Excessive jacking force | Verify soil parameters; consider reducing pile spacing or increasing pile size. | install relief holes