This is a drilling method by using large type boring machine to circulate slurry by using forward circulation method. Inject excavation slurry by using a side-pump, then discharge the excavated musk out of a hole by the fluid moving method. Cast-in-place concrete pile, H steel pile, steel pipe piles can be casted.
| Application | Cast-in-place pile |
| Preventive pile | |
| Soldier pile for retaining wall | |
| Steel pipe pile | |
| Preboring work for ready-made pile | |
| Foundation work at low attitude head pile | |
| Foundation work at narrow spaces or the like | |
| Iron tower foundation and so on |
