| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a soil improvement method by which aeration can be performed without cutting or damaging the fine roots of plants.SOLUTION: A vertical hole 2 is dug in the soil to be improved with digging means 1. Then, by using compressed air blowing means 3 for making compressed air stored in an air tank 9 blow in a moment through a nozzle pipe 10, the soil surrounding the vertical hole 2 is soften by blowing the compressed air toward a hole wall inside the vertical hole 2 at a predetermined depth position and giving the impact of the air explosion to the hole wall.</p> |
