Measurement of soil compaction around slurry injection slits

摘要

The compaction effect from slurry injectors on the soil in the slits may have a great influence on the redistribution of injected slurry. In order to optimise the application technology, the first step will be to develop a compaction index. Measurements of air permeability through soil samples taken from injection slits have been used as a method to indicate the effect of applicators in terms of soil compaction. A test probe has been designed, and tests carried out in the laboratory as well as in the field. Laboratory tests showed that the air permeability was influenced by soil compaction and soil moisture level. The field tests indicated that air permeability of undisturbed soil was quite different from the permeability of soil from injection slits produced by two different slurry injectors.