초록 ▼

An apparatus for piling a cast-in-place pile includes an earth auger main body and an auger head. The earth auger main body includes a hollow shaft, a spiral screw blade provided about the hollow shaft, a spiral belt provided on an outer circumference of the spiral screw blade and in parallel with a

An apparatus for piling a cast-in-place pile includes an earth auger main body and an auger head. The earth auger main body includes a hollow shaft, a spiral screw blade provided about the hollow shaft, a spiral belt provided on an outer circumference of the spiral screw blade and in parallel with an outer circumferential surface of the hollow shaft. The auger head is connected to a lower end of the earth auger main body and includes a holow shaft, one or two spiral screw blades provided about the hollow shaft, one or two spiral belts provided on outer circumferences of the spiral screw blades and in parallel with the outer circumferential surface of the hollow shaft, and excavating bits provided at a lower end of the spiral screw blades, and device for preventing excavated earth and sand from flowing in a return direction when the auger head is rotated in a reverse direction.

대표청구항 ▼

A cast-in-place piling method employing an earth auger main body having a hollow shaft, a spiral screw blade being provided about the hollow shaft, and a spiral belt being provided on an outer circumference of the spiral screw blade and being substantially parallel with an outer circumferential surf

A cast-in-place piling method employing an earth auger main body having a hollow shaft, a spiral screw blade being provided about the hollow shaft, and a spiral belt being provided on an outer circumference of the spiral screw blade and being substantially parallel with an outer circumferential surface of the hollow shaft, and an auger head being provided at a lower end of the earth auger main body and having check means for preventing excavated earth and sand from flowing in a return direction as the earth auger is rotated in a reverse direction, said spiral belt being provided over substantially the entire length of said earth auger main body; said method comprising the steps of excavating the ground to a predetermined depth by rotating said earth auger in a normal direction so that said earth auger penetrates the ground to said predetermined depth; placing said excavated earth and sand on said spiral screw blade; rotating said earth auger in the reverse direction thereby actuating said check means raising the earth auger together with excavated earth and sand; retaining excavated earth and sand on said spiral screw blade by said spiral belt to enable the earth and sand to be removed from the excavated hole; inserting reinforcing steel into the excavated hole; and pouring cement paste through a tremie pipe into the excavated hole to successively accumulate from the bottom to the top of the hole.