Geotechnical Society of Singapore (GeoSS) Building and Construction Authority (BCA)
: If a pile reaches the termination force at a depth significantly shallower than the design depth, the designer must reassess it before officially terminating. Course Hero 3. Design and Ground Considerations Negative Skin Friction
Good Practice 2.1: Conduct a Jackability Assessment using CPT data. Reject jacking if required force > 1.5 × static pile capacity (to avoid pile head damage). No pile jacking within 1
Geotechnical Society of Singapore (GeoSS) and regulatory bodies like the Building and Construction Authority (BCA)
Research suggests that for piles where the depth is less than 37 times the diameter, the ultimate capacity ( cap P sub u ) may be less than the jacking force ( cap P sub j isomer-user-content.by.gov.sg Protective Measures for Adjacent Structures Platform Preparation : Because jacking machines are heavy,
): Piles are typically jacked in steps to a force of 2.0 to 2.5 times the working load (WL) until practical refusal is reached. Settlement Verification ("Sets"):
Platform Preparation: Because jacking machines are heavy, the working platform must be of high quality, with rigorous compaction and proper site drainage to ensure stability. 000 kN today may deliver 7
For the resident engineer, the key takeaway is this: Termination force is not victory; controlled penetration and ground response are. For the contractor, invest in continuous logging systems and real-time heave monitoring. For the designer, remember the setup phenomenon – a pile that stops at 5,000 kN today may deliver 7,000 kN in a month.