Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore ((new)) <Essential FIX>

The pressure is released to zero and immediately re-applied.

As jacked piles are displacement piles, they can cause significant lateral soil movement and heaving, especially in soft clay or dense sand. The pressure is released to zero and immediately re-applied

Jacked piling has become a staple of Singapore’s urban construction landscape. Favoured for being vibration-free Favoured for being vibration-free To ensure the quality

To ensure the quality of the installed foundation piles, the following quality control and assurance measures should be implemented: The pressure is released to zero and immediately re-applied

| Formation | Characteristic | Jacking Suitability | Good Practice Focus | | :--- | :--- | :--- | :--- | | | Soft, high compressibility | Good (smooth penetration) | Avoid soil heave; control rate. | | Old Alluvium | Dense silty sand/gravel | Fair to Difficult | Pre-boring / jetting assistance allowed. | | Residual Soil / Weathered Granite | Stiff to hard, sandy silt | Good | Monitor set-up (thixotropic strength gain). |