Title:
BUBBLE EXCAVATION METHOD AND FOAMING AGENT FOR EXCAVATION
Document Type and Number:
Japanese Patent JP3514451
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a bubble excavation method excellent in the sampling performance to a stratum containing clay layer as the stratum of a landslide (measure) area, and a foaming agent for excavation.
SOLUTION: A minute bubble generator 4 set on a scaffold 3 through an air chamber tank 2 is connected to compressors 1 and 1. A solution of this foaming agent B is collected in the bubble generator 4. This foaming agent solution B is a mixed solution of an anionic surfactant and a nonionic surfactant with a concentration of 10%. A Laval nozzle 5 is provided on the upper part of the generator 4. A delivery hose 6 is connected to the Laval nozzle 5, and further connected to a rod 7 supported by a boring machine 11. The boring machine 11 is set on the scaffold 3. A sampler 8 having an inner tube 10 is provided on the tip of the rod 7. The drilling hole diameter is 120 mm, and the sample diameter is 92 mm. A bit 9 that is a drilling edge is rotatably provided on the tip of the sampler 9.
Inventors:
Tsukada, Motoharu
Application Number:
JP2001312937A
Publication Date:
March 31, 2004
Filing Date:
October 10, 2001
Export Citation:
Assignee:
ERUDE JAPAN:KK
International Classes:
E21B21/14; (IPC1-7): E21B21/14
Attorney, Agent or Firm:
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