Movement of vibrating and oscillating drums and its influence on soil compaction
نویسنده
چکیده
Dynamic roller compaction has become the common method for near-surface compaction, because dynamic rollers are much more efficient compared to static rollers. Two types of excitation are mainly used for dynamic roller compaction, the vibratory and the oscillatory roller. In the presented study the differences in functioning, mode of operation and loading the soil are outlined for the two types of excitation. First results of large-scale in-situ tests are presented in which the vertical earth pressure and tri-axial accelerations have been measured. Moreover a new indicator for the evaluation of the slip between the surface of an oscillatory drum and soil is presented. RÉSUMÉ La méthode du rouleau compacteur dynamique est devenue une des méthodes communes du compactage à proximité de la surface, parce que le rouleau compacteur dynamique est plus efficace que le rouleau compacteur statique. Il existe deux types d’excitations pour le rouleau compacteur dynamique principalement utilisés, le rouleau vibratoire et le rouleau oscillatoire. L’étude, qui est présentée décrit les différences de fonctionnements, d’opérations et de chargements du sol pour les deux types d’excitations. Les premiers résultats des tests in situ à grande échelle sont présentés, dans lesquels la pression verticale du sol et l’accélération triaxiale ont été mesurées. En outre un nouvel indicateur d’évaluation du glissement de la surface d’un rouleau oscillatoire et du sol est présenté.
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