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Title:
SHIELD MACHINE, AND STARTING METHOD AND ARRIVAL METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2009243221
Kind Code:
A
Abstract:

To provide a shield machine which facilitates linear control in tunnel excavation and which does not damage natural ground at its start, and a starting method therefor.

The shield machine 1 advances into the natural ground 13, while a slope 19 is excavated by cutter heads 10 of upper and lower cutter portions 2 and 3. Earth covering thickness in the advance of the shield machine 1 into the natural ground 13 is set 0.3 times as large in dimension as the height H of the shield machine 1. Thus, since the self-weight of an earthfill section is greater in magnitude than a frictional force which is generated between the natural ground 13 and the shield machine 1 along with the advance of the shield machine 1 into the natural ground 13, the earthfill section is prevented from swelling by being pulled in the penetration direction of the shield machine 1.


Inventors:
KANAI MAKOTO
MIKI KEIZO
TSUCHIYA KOSABURO
YOKOMIZO FUMIYUKI
FUKUMOTO KATSUJI
OTA MASASHI
NOMURA KAZUNARI
IZAWA MASAYOSHI
HINO YOSHIJI
Application Number:
JP2008093221A
Publication Date:
October 22, 2009
Filing Date:
March 31, 2008
Export Citation:
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Assignee:
OHBAYASHI CORP
International Classes:
E21D9/087; E21D9/06
Domestic Patent References:
JP2001193386A2001-07-17
JP2005030069A2005-02-03
JPS503131B11975-01-31
JPS60184196A1985-09-19
JP2000345790A2000-12-12
JP2007217926A2007-08-30
JPS58172590U1983-11-18
JP2006316494A2006-11-24
JP2007321537A2007-12-13
JP2006046061A2006-02-16
JP2005105695A2005-04-21
JP2006207141A2006-08-10
JP2004316115A2004-11-11
Attorney, Agent or Firm:
Isshiki International Patent Service Corporation



 
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