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Constructing an or temporary earth retaining walls if necessary.
For more detailed technical requirements, you can refer to these official resources:
Selecting the right hydraulic piling rig prevents premature refusal and structural failure of the pile section during installation. Load Capacity and Structural Integrity The jacking force ( Pjcap P sub j Should the text focus more on or structural
The Bukit Timah Granite profile includes highly weathered soils mixed with unweathered granite boulders. Jacked piles can hit an isolated boulder and reach a premature, false "refusal" above the true bedrock level.
Introduction Jacked foundation piles (mechanically jacked or hydraulically jacked) are widely used in Singapore’s dense urban environment for load-bearing support where vibration-sensitive or low-noise installation is required. Good practice combines careful planning, compliance with local regulations and standards, sound geotechnical assessment, precise execution, monitoring, and environmental and safety controls. The following essay outlines best practices across project phases tailored to Singapore’s soil conditions, regulatory environment, and typical urban constraints.
Re-jack all piles in a group after 24–48 hours of set-up to confirm no loss of capacity due to heave. Load Capacity and Structural Integrity The jacking force
under the guidelines established by the Geotechnical Society of Singapore (GeoSS) . This specialized deep foundation technique utilizes high-capacity hydraulic jacks to smoothly press preformed displacement piles directly into the ground. In Singapore's dense urban environment, jack-in piling has quickly become a preferred alternative to conventional driven or bored piles due to its environmentally friendly, low-noise, and vibration-free installation footprint. However, the complex local geology requires rigorous adherence to execution and design standards like Eurocode 7.
Avoids the messy bentonite slurry and soil disposal challenges of bored piling. Geological Challenges
Installing at strategic locations (e.g., at boundaries near neighboring structures). Pre-boring at the pile point. the SI must include:
: The pile material must be carefully checked so it is not over-stressed structurally during transport, handling, or maximum jacking thrust.
Before the first jacking ram engages, GEOSS mandates a with boreholes spaced at ≤25m intervals. Crucially, the SI must include: