| 摘要 |
<p>This improvement body creating method is characterized in that a nozzle (11) spraying a curing material solution in the radial direction is provided on a peripheral surface of a rod (110), the rod (110) is inserted into the ground, the hardener solution is sprayed from the nozzle (11) while rotating the rod (110) about the axis of the rod (110) in one circumferential direction and moving the same in one axial direction and is mixed into the ground to create a first plate-like improvement body (t11) which is inclined in a predetermined direction, and then the hardener solution is sprayed from the nozzle (11) while rotating the rod (110) about the axis of the rod (110) in the same circumferential direction and moving the same in the opposite axial direction and is mixed into the ground to create a plate-like improvement body (t12) which is inclined in the direction different from the plate-like improvement body (t11), thereby creating an inverted V-shaped improvement body (V11) configured from the plate-like improvement body (t11) and the second plate-like improvement body (t12).</p> |
