| 摘要 |
<p>PROBLEM TO BE SOLVED: To inexpensively construct a foundation pile having sufficient support strength.SOLUTION: The foundation pile is constituted by successively executing the steps of: forming a pit by burying a rotary blade 1 underground up to a predetermined depth by rotating a steel pipe 2 of connecting the rotary blade 1 to the lower end around the axis by thrusting the steel pipe 2 on the ground surface; inserting a paper tube 3 inside the steel pipe 2 coaxially with this steel pipe 2; extracting only the steel pipe 2 from underground by resolving the connection of the rotary blade 1 and the steel pipe 2; and injecting a filler 4 of hardening with the lapse of time into the pit via the inside of the paper tube 3. In construction of this foundation pile, cost can be reduced by reusing in the other construction place by extracting the steel pipe 2. While restraining an increase in material cost by using the inexpensive paper tube 3, collapse of an inner wall of the pit can be prevented. Thus, an excess adjustment such as arranging the inner wall in construction is obviated, and work cost can be reduced.</p> |
