Abstract:
RECENT STUDIES ON SOIL COMPACTION HAVE INDICATED THAT SOIL DENSITY IS AFFECTED BY TAMPING FOOT SIZE. THIS WAS INVESTIGATED ANALYTICALLY BY COMPUTING THE STRESSES IN THE COMPACTED LAYER BENEATH A TAMPING FOOT AND DETERMINING THE SOIL DENSITIES FROM THE RESULTS OF CONSOLIDATION TESTS. IT WAS ALSO INVESTIGATED EXPERIMENTALLY BY COMPACTING A SOIL IN A LARGE CYLINDER WITH DIFFERENT LAYER THICKNESSES AND DIFFERENT SIZES OF TAMPING FEET. THE RESULTS OF BOTH THE ANALYTICAL AND EXPERIMENTAL INVESTIGATION INDICATE THAT COMPACTION IS IMPROVED AS THE RATIO OF TAMPING FOOT DIAMETER TO SOIL LAYER THICKNESS IS INCREASED. WHEN THE RATIO EXCEEDS 2, HOWEVER, THE BENEFIT OBTAINED BY INCREASING THE RATIO BECOMES LESS; AND IT MAY BE OBSCURED BY THE "BRIDGING" OF LARGE-DIAMETER FEET OVER SOFT SPOTS IN THE SOIL LAYER BEING COMPACTED. /AUTHOR/
Supplemental Notes:
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