Current market capabilities in Singapore include machines with jacking capacities up to , though it is recommended to operate these machines at approximately 75% of their maximum capacity for optimal safety and performance. GeoSS Good Practice Guidelines
: The Kentledge method is frequently used in Singapore to determine geotechnical design values and settlement responses.
To confirm the design assumptions, GeoSS Guidelines on Pile Load Testing recommend: This method is particularly suitable for Singapore’s urban
Jacked piling, also known as hydraulic jacking, involves pushing precast or spun piles into the ground using static hydraulic force rather than dynamic impact. This method is particularly suitable for Singapore’s urban environment, where noise and vibration from traditional driven piles could damage adjacent structures.
: In areas like the Jurong Formation or Bukit Timah Granite , varying rock profiles can lead to "short piles" if boulders or hard layers are encountered unexpectedly. 3. Machine Stability and Safety Machine Stability and Safety : Allowable pile top
: Allowable pile top settlements are typically limited to 15mm at 1.5 times WL and 25mm at 2.0 times WL .
The GeoSS Guidelines emphasize several critical factors for successful installation: also known as hydraulic jacking
: Continuous monitoring of pile heave is essential. The jacking of adjacent piles can cause an already installed pile to lift, potentially separating the pile base and leading to a loss in end-bearing capacity.
The Geotechnical Society of Singapore (GeoSS) has established a Guideline on Jacked Piles to standardize the installation of jacked foundation piles, a method favored in Singapore for its vibration-free and low-noise characteristics.
: Rigs should undergo a regular maintenance regime with daily, monthly, and yearly checklists to ensure they remain in safe working condition. Verification and Load Testing