Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore [2021] Jun 2026

Displaces surrounding soil, damaging adjacent utilities, tunnels, or foundations.

Ensuring the rate of settlement drops below local specified limits (e.g., less than 2mm per cycle). High-Strain and Static Load Testing

The following technical paper outlines the core principles and "good practice" standards derived from GeoSS recommendations and local industry standards. A heavy machine equipped with central hydraulic rams

A heavy machine equipped with central hydraulic rams that clamp and push the pile.

GEOSS Good Practice for Installation of Jacked Foundation Piles in Singapore Introduction Within 1 hour of jacking, re-level the pile head

However, successful implementation requires rigorous adherence to quality standards. This is where the provides essential direction through its Good Practice Guide .

Within 1 hour of jacking, re-level the pile head. Any rebound > 5 mm indicates negative skin friction potential – notify design engineer. Within 1 hour of jacking

The Geotechnical Society of Singapore (GeoSS) provides crucial industry frameworks to ensure these piles are installed safely, efficiently, and in compliance with local regulations. This article details the GeoSS good practices for installing jacked foundation piles within Singapore’s unique geological and regulatory landscape. 1. Understanding Jacked Piles in Singapore's Context

A successful jacked piling campaign relies entirely on accurate desk studies and soil investigation (SI). GeoSS emphasizes that saving costs on SI frequently leads to project delays and pile damage. Soil Investigation Protocol

Characterized by deep pockets of marine clay, this formation exhibits very low shear strength and high compressibility. Jacked piles easily penetrate these soft layers, but engineers must account for low shaft resistance and potential long-term negative skin friction (downdrag) caused by surrounding ground settlement. The Jurong Formation

┌──────────────────────────┐ │ Rig Setup & Leveling │ └─────────────┬────────────┘ │ ▼ ┌──────────────────────────┐ │ First Element Pitching │ └─────────────┬────────────┘ │ ▼ ┌──────────────────────────┐ │ Continuous Penetration │ └─────────────┬────────────┘ │ ▼ ┌──────────────────────────┐ │ Segment Joint Welding │ └─────────────┬────────────┘ │ ▼ ┌──────────────────────────┐ │ Final Termination Criteria│ └─────────────┬────────────┘ │ ▼ ┌──────────────────────────┐ │ Quality Assurance Testing│ └──────────────────────────┘ Step 1: Rig Setup and Alignment