Geoss Good Practice For Installation Of Jacked Foundation Piles In Singapore Upd | LEGIT – 2027 |

Geoss Good Practice for Installation of Jacked Foundation Piles in Singapore

Abstract
This paper examines best-practice recommendations—hereafter referred to as “GEOSS Good Practice”—for the installation of jacked foundation piles in Singapore. It synthesizes geotechnical, structural, environmental, and construction-management considerations specific to Singapore’s geology, regulatory context, and urban constraints. Recommendations are practical, prescriptive, and intended for design engineers, contractors, site supervisors, and project owners involved in piled foundation works where jacking (hydraulically driven, displacement or pre-bored) methods are employed.

A pile is generally considered "set" if the downward movement does not exceed 10 mm with a minimum holding time of 30 seconds. Geoss Good Practice for Installation of Jacked Foundation

. The Geotechnical Society of Singapore (GeoSS) has established several good practices for their installation and testing. Key Installation Practices Machine Capacity Adopted hydraulic jacked spun piles (400 mm dia, 24 m long)

5.4 Jointing and Splicing

Site Investigation and Ground Characterization
2.1 Objectives than the approved plan, the designer must submit

• Adopted hydraulic jacked spun piles (400 mm dia, 24 m long).
• Installation sequence: spiral outward from centre, with 6-hour delay between piles in a group.
• Real-time monitoring of jacking force vs. penetration at 20 Hz.
• Set criteria: final 10 mm stroke requiring 2,800 kN (1.8 x working load).

than the approved plan, the designer must submit an amendment plan and may require additional load tests to verify capacity. Protective Measures for Adjacent Structures

Verticality Monitoring: Constant checks on the verticality of the pile and the quality of welding for joining pile sections are mandatory.