Effect of a Tracked Vehicle Mounting an Oscillator on the Vibro-Compaction of a High Lifted Decomposed Granite Sandy Soil

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

“…The sandy soil had a maximum grain size of 4.75 mm, an average grain size of 1.00 mm, a coefficient of uniformity of 4.2, a coefficient of curvature of 0.9, and a specific gravity of 2.66. From the compaction test results having a dynamic compaction energy of 551.3 kNm/m 3 due to 045_TB1.doc-1 -JISA 1210, 1.1a, it was observed that the maximum dry density of 1.98 g/cm 3 was obtained at the optimal moisture content of 10.6 % and the degree of saturation of 82.1 %. A cone penetrometer test was conducted to measure the relationship between a cone index and a dry density of soil.…”

“…New compaction machinery achieving a distinguished highly efficient compaction at deep stratum should be developed. So far, the authors have demonstrated that the compaction method due to a dynamic plane load of vibratory tracked vehicle is better than that due to a dynamic line load of vibratory road roller [2] because of the highly efficient compaction work due to a confinement of lateral movement of soil particles [3]. The purpose of this paper is to evaluate the effects of a vertically vibrating and jumping tracked vehicle in the case of load ratio of maximum vertical exciting force to a total weight of tracked vehicle of 1.0 and 2.0 on the vibrating and jumping compaction of decomposed granite scattered to 45 cm thickness and to establish a new automatic control system of the degree of compaction of soil.…”

“…where γW is the density of water of 1.00 g/cm 3 , p0 is the atmospheric pressure of 98.0 kPa and r is the coefficient of correlation.…”

“…A cone penetrometer test was conducted to measure the relationship between a cone index and a dry density of soil. As a result, the dry density of sandy soil ρd (g/cm 3 ) was expressed as the function of the cone index qc (kPa) in the following non-dimensional equation;…”

“…A flat test terrain with a depth of 45 cm having an initial uniform dry density of 1.20±0.04 g/cm 3 with depth was prepared for the compaction test.…”