Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore May 2026
Good Practice Report: Installation of Jacked Foundation Piles in Singapore
1. Introduction
Jacked piling (also known as displacement piling) involves installing pre-cast concrete or steel piles into the ground using hydraulic jacks reacting against the weight of the rig or previously installed piles. In Singapore, jacked piles are widely used for:
5.4 Jointing and Splicing
| Step | Action | Control Parameter |
| :--- | :--- | :--- |
| 1 | Lower pile into jig. | Eccentricity < 10 mm. |
| 2 | Apply initial seating load. | 10% of working load (WL). |
| 3 | Commence continuous jacking. | Rate: 0.5–1.5 m/min (max 2 m/min). |
| 4 | Pause every 2 m for verticality check. | Deviation < 1:200. |
| 5 | At termination: Hold for 30 s. | Pressure decay < 5%. | Static load tests (commonly maintained load or Osterberg
End of Article
- Static load tests (commonly maintained load or Osterberg cell where applicable) on representative piles to verify capacity and settlement performance. For jacked piles, conduct at least one full-scale test in each ground condition encountered.
- Dynamic monitoring: use pile driving analyzer (PDA)-type instrumentation adapted to jacking installations to estimate shaft and end-bearing from force/velocity records where practicable.
- Integrity testing (PIT/CSL) to detect defects, inclusions, or voids for concrete-filled or composite piles.
Good Practice Report: Installation of Jacked Foundation Piles in Singapore
1. Introduction
Jacked piling (also known as displacement piling) involves installing pre-cast concrete or steel piles into the ground using hydraulic jacks reacting against the weight of the rig or previously installed piles. In Singapore, jacked piles are widely used for:
5.4 Jointing and Splicing
| Step | Action | Control Parameter |
| :--- | :--- | :--- |
| 1 | Lower pile into jig. | Eccentricity < 10 mm. |
| 2 | Apply initial seating load. | 10% of working load (WL). |
| 3 | Commence continuous jacking. | Rate: 0.5–1.5 m/min (max 2 m/min). |
| 4 | Pause every 2 m for verticality check. | Deviation < 1:200. |
| 5 | At termination: Hold for 30 s. | Pressure decay < 5%. |
End of Article
- Static load tests (commonly maintained load or Osterberg cell where applicable) on representative piles to verify capacity and settlement performance. For jacked piles, conduct at least one full-scale test in each ground condition encountered.
- Dynamic monitoring: use pile driving analyzer (PDA)-type instrumentation adapted to jacking installations to estimate shaft and end-bearing from force/velocity records where practicable.
- Integrity testing (PIT/CSL) to detect defects, inclusions, or voids for concrete-filled or composite piles.
