| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for mixing a cylindrical hardening material, having little loss and executed with high efficiency at a low cost. SOLUTION: In this method of mixing the cylindrical hardening material, a nozzle is provided at the lower end of a filling pipe, and the hardening material is jetted from the nozzle at high pressure while rotating the filling pipe. The hardening material is thereby mixed into the object ground to form a cylindrical hardening material mixed layer, and work is executed to arrange a plurality of cylindrical hardening material mixed layers regularly in longitudinal and lateral directions in plan view. This method, is executed to allow the cylindrical hardening material mixed layers to overlap only in one direction and to abut one another in the other direction in plan view.
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