Effect of Tamping Conditions on Compaction and Deformation by Heavy Tamping in Centrifuge

Time-Domain Analysis of Tamper Displacement during Dynamic Compaction Based on Automatic Control

“…Each tamping point was tamped ten times for each group and the crater depth in each tamping was detected with a levelling instrument. Considering the effect of different combinations of tamper weight and falling height on the DC efficiency [5,29], three groups of the tamper weight and the drop distance were adopted. They were 47.94 t × 20.86 m, 61.98 t × 16.14 m, and 77.76 t × 12.86 m. The tamping points were spaced 10 m and arranged in a square shape, as shown in Figure 4.…”

“…A number of studies have reported that a heavier tamper with a lower dropping distance tends to result in a higher value of crater depth with the same energy level [18,29,30]. Therefore, the empirical coefficients β were 0.4, 0.5, and 0.52 in the DC group of 47.94 t × 20.86 m, 61.98 t × 16.14 m, and 77.76 t × 12.86 m, respectively.…”