Implant Foundations-Press-In Piling Method for Urban Construction-Paper

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The Press-in Piling Method installs preformed piles using static hydraulic force rather than impact or vibration. A compact machine grips previously installed piles to generate the reaction force, pressing new piles into the ground. This creates “Implant Foundations”: embedded foundations that work with the surrounding soil to provide bearing capacity and resistance to horizontal loads.<br /><br />The method is designed for urban construction, where noise, vibration, and ground movement can disrupt nearby buildings and activities. Its main noise source is the power unit, producing steady, relatively low noise; the paper reports that vibration remains below 5 mm/s. A push-and-pull procedure helps reduce installation-related ground displacement.<br /><br />The system can install U- and Z-shaped sheet piles and tubular piles, supporting applications from retaining walls and basements to deep excavations and station structures. Four installation modes extend its use across varied ground conditions: standard static jacking for soft ground; water jetting for medium to dense or stiff ground; simultaneous augering for very hard or obstructed ground; and rotary cutting for tubular piles in less-weathered rock.<br /><br />Compared with conventional footing foundations, Implant Foundations can be installed directly into the ground, reducing excavation, worksite area, construction time, and cost. The piling machine also monitors horizontal and vertical loads during installation. The paper presents the method as a low-nuisance alternative capable of forming robust, resilient foundations in both very soft and very hard soils.

Keywords

press-in piling

static hydraulic force

implant foundations

sheet piles

tubular piles

urban construction

vibration control

retaining walls

deep excavations

ground displacement