The RDVK-Vibrocontrol research project was carried out within the framework of the Bridge 1 research funding programme of the Austrian FFG by the project partners TU Wien, Institute of Geotechnics, University of Innsbruck, Institute of Basic Engineering Sciences, Keller Grundbau Österreich Ges.mbH and VCE Vienna Consulting Engineers ZT GmbH. 

Vibro-compaction has been successfully used for deep compaction of coarse-grained soils since the early 1930s. The main advantages of vibro-compaction are the homogenisation of the subsoil in addition to the anticipation of settlement through compaction of the soil. 

In the course of the research project, the dynamic interaction between the deep vibrator and the soil to be compacted was investigated experimentally and theoretically. The motion behaviour of the deep vibrator, various process parameters and the wave field on the surface of the ground were measured in large-scale experimental investigations on a test field. 

Based on the findings of the measurement data evaluation, an analytical model was developed. This allows a fundamental investigation of the relationship between the current stiffness of the soil and the motion behaviour of the deep vibrator and subsequently a delimitation of essential soil physical processes in the soil to be compacted. 

The quantification of the compaction success is based on an indicator that can be derived directly from the measured data. This allows depth-dependent compaction control along the compaction section and provides information about the homogeneity of the soil body produced in the test soil, which means that a room-filling control of the compaction work can be achieved.

Doctoral Thesis of DI Dr. Péter Nagy in reposiTUm, opens an external URL in a new window.