Zum geregelten Vibrieren von Profilen in den Boden

On controlled vibratory driving into the soil. Vibratory installation of profiles is established practice and, compared with impact driving, often offers advantages in installation time as well as reduced noise and vibration emissions. In practice, the key machine parameters (e.g., frequency, static eccentric moment, and, if applicable, static load) are still largely selected based on experience, although the installation process represents a complex, soil-dependent multi-objective problem. This paper consolidates research on cost-effective, tolerance-compliant profile installation. It presents developments in vibrators and experimental setups for sensor-based process monitoring, optimization criteria, and control approaches for adapting operating parameters. A focus is placed on processes at the profile toe in saturated soil during so-called cavitational driving. Numerical studies (CFD-DEM, SPH) and an instrumented test rig show that the upward motion can cause a pronounced drop in pore water pressure and local liquefaction of the soil beneath the profile toe, explaining the high process efficiency and indicating pathways to improve bearing capacity. In addition, data-driven methods (Dynamic Mode Decomposition) for short-term prediction of ground vibrations as a component of real-time monitoring and control are discussed. Finally, an outlook is given on the DFG project DROPS, which investigates downward forces as well as stiffness requirements of profiles and driving guides to meet installation tolerances.

Subjects

directional vibration

optimisation

vibratory pile driving

DDC Class

600: Technology

624.17: Structural Analysis and Design

624.1: Structural Engineering

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Zum geregelten Vibrieren von Profilen in den Boden