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

Jacked-in steel pipe piles and jack‑in steel H-piles are explicitly listed as acceptable pile types by HDB, alongside bored piles and micropiles (timber piles are not acceptable).

While primarily designed for impact-driven piles, Dynamic Load Testing (PDA) is selectively adapted for jacked piles in Singapore to quickly verify structural integrity and capacity. Gages are attached to the pile head, and a drop hammer delivers a dynamic impact to generate force and velocity wave traces. Low Strain Integrity Testing (PIT)

For precast concrete or spun piles, mechanical joints or full-penetration butt welding of steel end plates are used. Jacked-in steel pipe piles and jack‑in steel H-piles

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It is imperative to conduct an adequate site investigation to identify all ground formations and layers, and to determine ground properties. The extent must include a sufficient number of site investigation boreholes and sufficient exploration depth. Unnecessary cutting down in site investigation costs may prove to be “penny wise, pound foolish”—a cost too hefty to pay. Low Strain Integrity Testing (PIT) For precast concrete

Observations from past projects have indicated that and pile heave during piling work are issues that may be encountered during construction. If these issues are not detected and arrested early, the adequacy of the foundation could be undermined. Hence, design and construction of driven or jacked piles must be performed in accordance with the requirements and guidelines stipulated in the circular, particularly for high‑rise buildings underlain by thick layers of soft clay deposits.

[ Hydraulic Jacking Rig ] │ ▼ (Static Compression Force) [ Prefabricated Pile Segment ] │ ▼ ┌─────────────────────┐ │ Soft Clay Layer │ ◄── Smooth Penetration ├─────────────────────┤ │ Residual Soil / │ ◄── Increased Resistance │ Bedrock Layer │ (Target Stratum) └─────────────────────┘ Key Components of a Jacked Piling System Unnecessary cutting down in site investigation costs may

: Piling machines must undergo a regular maintenance regime by a dedicated team, with daily, monthly, and yearly checklists to ensure equipment is always in good condition. Compliance and Regulatory Framework

Good Practice for Installation of Jacked Foundation Piles in Singapore

6.3 Trigger and Action Levels

: A comprehensive technical draft covering ground movement control and protective measures.