| 摘要 |
PROBLEM TO BE SOLVED: To fill the large depth and a long section, with improved work efficiency and reduced drilled hole diameter, in a ground filling construction method of the ground having a risk of liquefaction, particularly, an existing structure lower part hard to fill the ground. SOLUTION: This ground filling construction method comprises an outer pipe 20 having an outer pipe delivery port 22, and an inner pipe 21 loosely inserted into the outer pipe 20, having a plurality of expansive-contractive inner pipe packers 27 at an interval so as to sandwich the outer pipe delivery port 22, also having a packer inner delivery port 29 and having an inner pipe delivery port 30 between the inner pipe packers 27 provided at an interval. An outer pipe inner space 32 is arranged in a drilled hole 23 drilled by a boring rod for incorporating a position information transmitter on the tip, and is formed between the plurality of inner pipe packers 27 by sending a filling liquid to an inner pipe flow passage 31. The filling liquid is delivered in the the outer pipe inner space 32 from the inner pipe delivery port 30, and is filled in the ground via the outer pipe delivery port 22. COPYRIGHT: (C)2006,JPO&NCIPI
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