Jacked piles are preferred in Singapore's urban environment due to specific performance characteristics:
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GEOSS Good Practice for Installation of Jacked Foundation Piles in Singapore Jacked piles are preferred in Singapore's urban environment
To maintain high structural standards across complex geologies, the Geotechnical Society of Singapore (GeoSS) established strict engineering guidelines. Compliance with these frameworks ensures project safety, limits displacement impact on nearby structures, and aligns execution with Eurocode 7 and Building and Construction Authority (BCA) standards. 1. Overview of Jacked Piling Systems in Singapore
The draft guideline for the installation of jacked piles includes several "good practices" to ensure quality and compliance with Eurocode 7 . Key Good Practices for Jacked Pile Installation Overview of Jacked Piling Systems in Singapore The
Automatic data loggers should record jacking force versus depth continuously. Sudden drops in pressure may indicate pile damage or unexpected soft pockets.
Jacked piling, also known as hydraulic jacking, involves pushing precast or spun piles into the ground using static hydraulic force rather than dynamic impact. This method is particularly suitable for Singapore’s urban environment, where noise and vibration from traditional driven piles could damage adjacent structures. Jacked piling, also known as hydraulic jacking, involves
is released to zero and subsequently re-applied without pause to confirm capacity. 3. GeoSS Recommended Best Practices
Jacked piling—or jack-in displacement piling—utilizes a specialized hydraulic machine rig loaded with massive concrete counterweights (kentledge blocks) to press precast or spun steel sections directly into the earth. Unlike driven piling methods that use impact hammers, jacking eliminates aggressive acoustic shockwaves and ground-borne vibrations. This makes it the ideal system for land-scarce urban pockets adjacent to active Mass Rapid Transit (MRT) tunnels, historic utilities, and high-density residential properties.
Before examining the document's contents, it's helpful to understand the organization behind it. The Geotechnical Society of Singapore (GeoSS) is the nation's premier professional body for geotechnical engineering, established in 2008 to promote excellence and best practices within the industry. As a member of the International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), GeoSS actively shapes technical standards and guidelines. The joint circular you are about to read is a direct result of GeoSS’s mission to provide authoritative guidance to Singapore's building professionals.
: If the termination force is reached but the pile is significantly shorter than the design depth, the designer must specifically assess if it can be terminated or if further measures are needed.
