Singapore | Geoss Good Practice For Installation Of Jacked Foundation Piles In

[ Hydraulic Jacking Rig ] │ ▼ (Jacking Force: Pj = 2.0 to 2.5 x WL) ┌─────────────────┐ │ Piling Segment │ └─────────────────┘ │ ▼ (Displaces soil laterally) =================== ◄── Ground Level │ ▼ (Driven to Practical Refusal) 1. Key Engineering Parameters The Jacking Force ( Pjcap P sub j

Because jack-in machines are exceptionally heavy, the working platform must be high-quality, emphasizing proper compaction and site drainage . 3. Addressing Local Geological Challenges

Protects adjacent aging structures and sensitive utilities from settlement. [ Hydraulic Jacking Rig ] │ ▼ (Jacking Force: Pj = 2

Install bored holes (400–600 mm diameter) at strategic boundaries to allow displaced soil to enter, reducing lateral pressure on neighbouring structures. Pre-boring:

: Used to verify design parameters. Trial piles should be tested to loads as high as 3.5 WL to reach the ultimate limit state. Trial piles should be tested to loads as high as 3

Appendix A — Example: Typical Monitoring Plan (concise)

Buckling or cracking of concrete pile sections during pressing. the working platform must be high-quality

Modern jacking rigs must be equipped with automated data loggers. These systems record: Jacking force versus depth profile. Verticality deviations. Rate of penetration. Structural and Environmental Monitoring

Comprising highly folded and faulted sedimentary rocks like sandstone, siltstone, and shale, this formation features unpredictable weathering profiles. Piles may encounter sudden refusal at shallow depths due to unweathered rock boulders, or require deep penetration through thick profiles of completely weathered residual soil (Grade VI to IV). The Old Alluvium (OA)

Good Practice for Installation of Jacked Foundation Piles in Singapore