EXPERIMENTAL CONSIDERATIONS IN THE EFFECT OF A VIBRO-TRACKED VEHICLE MOUNTED WITH A CENTRIFUGAL OSCILLATOR ON THICK-LIFT DECOMPOSED GRANITE COMPACTION

The aim of this paper is to evaluate the effect of plane load of a tracked vehicle mounted with a centrifugal oscillator on the vibro-compaction of a thick-lift decomposed granite soil of depth of 80cm. The vibro-compaction test was executed in a large soil bin using a small tracked vehicle of total weight of 10.9kN, having a constant exciting force of 9.8kN in the range of frequency of 16 to 57Hz. As a result, it was observed that the amount of depression of ground surface and the dry density at deep stratum showed the maximum value respectively, at the frequency of 16.0Hz. The value of the maximum dry density was confirmed by the triaxial relationship between volume and octahedral normal and shear stress ratio and the stress measurement using SST.