Title:
EARTH-RETAINING WALL EXCAVATING METHOD AND TUNNEL EXCAVATOR
Document Type and Number:
Japanese Patent JP2002061486
Kind Code:
A
Abstract:
To improve workability and safety by surely excavating a starting opening of a predetermined shape when starting a tunnel excavator in a shaft in an earth-retaining wall excavating method and the tunnel excavator.
A shield excavator is transferred into a starting shaft 51. A reaction force is received by a reaction force receiving facility 53 and a temporarily assembled segment S. An oil hydraulic jack 39 is extended in an earth- retaining wall supporting device 38 to bring a presser plate 40 into contact with the earth-retaining wall 54. With the earth-retaining wall 54 pressed, a location in the earth-retaining wall 54 corresponding to a protrusion 35 is cut by a workman with a drill 55 to form a through hole 56.
Inventors:
SUGIYAMA MASAHIKO
TSUDA MITSUNORI
KAWASHIMA JUNJI
ABE SHIGEKI
KAJIYAMA MASAO
TSUDA MITSUNORI
KAWASHIMA JUNJI
ABE SHIGEKI
KAJIYAMA MASAO
Application Number:
JP2000246162A
Publication Date:
February 28, 2002
Filing Date:
August 15, 2000
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
KUMAGAI GUMI CO LTD
KUMAGAI GUMI CO LTD
International Classes:
E21D9/06; (IPC1-7): E21D9/06
Attorney, Agent or Firm:
Toshiro Mitsuishi (2 outside)
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