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D. Adam, F. Kopf, I. Paulmichl:
"Modelling and Simulation of Heavy Tamping Dynamic Response of the Ground";
in: "Proceedings of the XIVth Danube-European Conference on Geotechnical Engineering", herausgegeben von: TU Bratislava; Eigenverlag, Bratislava, Technical University, 2010, (eingeladen), ISBN: 978-80-227-3279-6, S. 107.

Heavy tamping is a deep dynamic compaction technique and has been
increasingly used since beginning of the Seventies. The paper reports on in situ measurements
and theoretical investigations referring to the decay of free soil vibrations caused by the falling
weight after each impact. This behaviour is significant for the respective soil falling mass
interaction and enables a site-specific optimisation of the heavy tamping technique. The field
tests comprised acceleration measurements of the falling mass and the soil whereby the falling
height was changed repeatedly. The decay of the amplitudes of free vibrations provided a
damping coefficient and a damped natural frequency, which are used to determine the Poisson´s
ratio and the E-modulus of the ground after each impact from numerical calculations. Scope of
the research project was to gain a reliable indicator for the degree of compaction of the soil
immediately after each impact, hence a method for compaction control and documentation.

Heavy tamping; compaction technique; in situ measurements;

http://publik.tuwien.ac.at/files/PubDat_186214.pdf