: If piles penetrate consolidating soft soil, designers must account for long-term downdrag forces
When connecting prefabricated pile segments, welding must be executed by certified welders.
Pile heave is a significant concern in soft clay deposits and can reduce a pile's load-bearing capacity. For projects in high-risk categories, heave monitoring of previously installed piles is mandatory during the installation of adjacent piles. This requirement is a key component of the BCA's risk-based approach. : If piles penetrate consolidating soft soil, designers
The hydraulic rams press the pile into the ground in structural strokes. As each segment nears the ground level, a subsequent segment is joined. Splicing in Singapore typically involves full-penetration welding of steel joint plates. The weld must be inspected visually and via non-destructive testing (NDT), such as ultrasonic testing, to ensure structural continuity before jacking resumes. 3. Real-Time Telemetry Monitoring
Massive steel or concrete blocks loaded onto the rig to provide the necessary reaction force against the soil resistance. This requirement is a key component of the
Singapore’s underground profile is highly complex and varies across short distances. Successful jacking requires adapting to specific formations.
: For high-capacity projects, Specialist Builders (categories G2 and G3) must maintain a minimum number of jacked rigs with specific counterweight requirements (e.g., 200-ton and 400-ton minimums). AI responses may include mistakes. Learn more : For high-capacity projects
: Typically, piles are jacked with a force adjusted in steps to a value of 2 to 2.5 times the Working Load (WL) until practical refusal is reached. The Set Procedure : Pjcap P sub j is released to zero and immediately re-applied.
For larger pile groups, it is recommended to jack from the inside out or in a consistent direction (e.g., left to right) to manage ground displacement and potential heave. Alignment & Verticality: