Since the pile penetrates the soil by rotating the steel pipe without excavating, absolutely no waste soil is generated. This construction method is suitable for conditions where it is necessary to suppress soil discharge, such as when the soil is contaminated.

A large bearing force can be obtained due to compaction of the tip soil caused by rotating press fitting and the bottom expansion effect of the blade. Additionally, the passive applied force that acts as a propulsive force on the blades during penetration then acts as withdrawal resistance. This makes it possible to obtain large withdrawal bearing force.

By rotating the steel pipe in the opposite direction than the time of penetration, the pile can be easily withdrawn and applied as a temporary pile.

The applicable pile diameter is 400 mm to 1,600 mm in the civil engineering field, and 100 mm to 1,600 mm in the construction field, which enables economical design according to the conditions of the soil and structures. Furthermore, we offer numerous types of construction equipment, ranging from full rotation pile drivers for large diameter piles to self-propelled pile drivers (6 ton class to 45 ton class) for medium and small diameter piles. Users can select the equipment type according to construction conditions.

Since the pile driver is compact and uses few facilities, it can be used for construction in narrow spaces. Moreover, since no waste soil is discharged during construction, there is no need for a soil disposal yard or a yard for installing plant facilities. This makes compact construction possible. Furthermore, since no waste soil is discharged, it does not loosen the soil around the piles and therefore does not affect nearby structures.