Unnecessary of Disposal of Surplus Soil. Disposal of surplus soil is not required due to not using excavating work. 

Possible to Reusing. It is possible to install the other place or demolish because it can be pull out by back lashing easily. 

Optimal the Soft Ground. Bearing capacity is increased on the soft ground to vertical direction and it can makes foundation on the difficult place not possible with existing methode. 

Non-Vibration Work. According to hydraulic auger and circulation press-in, non-vibration, anti-noise work is possible and makes construction condition simple.