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Title:
LEAKED AIR RECOVERY DEVICE FOR USE IN CAISSON METHOD
Document Type and Number:
Japanese Patent JP2009209581
Kind Code:
A
Abstract:

To provide a leaked air recovery device for use in a caisson method, which is simple in structure, recovers leaked air leaking outside from a caisson work chamber, and preferably returns air contained in the leaked air to the atmosphere and groundwater to the ground, respectively, without fail, by separating the former from the latter.

The leaked air recovery device is formed of: leaked air recovery holes 24 opened in a peripheral surface of a caisson body 11 at locations above a cutting edge portion 14; leaked air recovery passages 25 each having one end thereof tied to the leaked air recovery hole 24 and the other end thereof communicating with the atmosphere; air feeding passages 26 each having one end thereof tied to the leaked air recovery passage 25 at a location close to the leaked air recovery hole 24; and a compressed air feeding means (e.g. an air compressor 18) tied to the other end of each air feeding passage 26. The leaked air recovery holes 24 are formed in the peripheral surface of the caisson body 11 at a plurality of locations along the horizontal direction. Further the leaked air recovery device has a groundwater returning means (e.g. a separating reservoir tank 31) arranged across each leaked air recovery passage 25 at an end on an atmosphere communicating side.


Inventors:
KOZUKI NAOAKI
KONDO NORIO
IMAMURA HIDEO
Application Number:
JP2008053515A
Publication Date:
September 17, 2009
Filing Date:
March 04, 2008
Export Citation:
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Assignee:
DAIHO CONSTRUCTION CO LTD
International Classes:
E02D19/20; E02D23/10
Domestic Patent References:
JP2002088770A2002-03-27
JP2001262584A2001-09-26
JPS5616733A1981-02-18
JP2002256538A2002-09-11
JPS55105031A1980-08-12
JPH0921137A1997-01-21
JPH0559731A1993-03-09
JP2006348482A2006-12-28
JPH08134924A1996-05-28
Attorney, Agent or Firm:
Hiroshi Sano
Akio Ishii