To provide a ground improvement method superior in work efficiency, reducing restriction from a construction condition, and superior in economic efficiency; and a reinforcing method of an existing structural foundation using this ground improvement method.
This ground improvement method improves the ground in order from a small area existing in the lowest stage by dividing an area being an object of a ground improvement into a plurality of small areas continuing in the height direction; and constructs a ground improvement body by repeatedly performing a cutting process of pulling up a double tube by the predetermined height while rotating the double tube 10 while injecting a water jet Jw in the horizontal direction from a tip part of the double tube 10 inserted up to the predetermined depth in the respective small areas, a rod lowering process of lowering the pulled-up double tube 10 by a pulled-up quantity, and an injecting agitating process of pulling up the double tube by the predetermined height while rotating the double tube 10 while injecting a hardener jet Jg in the horizontal direction from the tip part of the lowered double tube 10.
NAGAO TOSHIMASA
SUZUKI HIROMI
| JPH06158638A | 1994-06-07 | |||
| JP2000054368A | 2000-02-22 | |||
| JPH04306310A | 1992-10-29 | |||
| JPH07111052B2 | 1995-11-29 |
Etsuo Tada
Nosho Machida