Automatic Control System of the Degree of Compaction of a High Lifted Decomposed Granite Soil for a Vertically Vibrating and Jumping Tracked Vehicle

The purpose of this paper is to establish a new automatic control system of the degree of compaction of a high lifted decomposed granite soil i.e. the accurate controlling method of the number of dynamic compacting passes of a vertically vibrating and jumping tracked vehicle mounted with a vertical oscillator. In these tests, the spectrum disturbances of the wave of acceleration of the tracked vehicle were analyzed to evaluate the uniformly distributed dry density and the degree of compaction of soil. The relationships between the spectrum disturbance and the dry density of soil were discussed for the load ratio of a maximum vertical exciting force to a total weight of tracked vehicle of 1.0 and 2.0. As a result, it was clarified that the real time measurement of the spectrum disturbance was very useful to raise the quality of compacted embankment and the vibratory compaction effects of vertical exciting force of a tracked vehicle on the dynamic compaction of a high lifted decomposed granite.