SHIELD EXCAVATION DEVICE, AND CONSTRUCTING METHOD OF TUNNEL USING THE SAME

Title:

SHIELD EXCAVATION DEVICE, AND CONSTRUCTING METHOD OF TUNNEL USING THE SAME

Document Type and Number:

Japanese Patent JP2000087681

Kind Code:

A

Abstract:

To provide a shield excavation device capable of suppressing the cost in constructing a tunnel.

This shield excavation device 1 is provided with first and second shield excavators 2, 3. The first shield excavator 2 is provided with a cutter head 16. The cutter head 16 is provided with an excavation part to excavate a tip side of the excavator 2 and an outer circumferential excavation part 18 to excavate the outer circumferential side. The outer circumferential excavation part 18 is provided with a copy cutter 25 to be freely projected/retracted from the outer circumferential surface of the cutter head 16 and an expandable jack 26 capable of projecting/retracting the copy cutter 25. The second shield excavator 3 is formed larger in diameter than the first shield excavator 2, and provided with an opening part 44 to which the excavator 2 is fitted. The second shield excavator 3 is provided with an annular cutter head 46. The cutter head 46 is provided with a hole 54 to which the copy cutter 25 is fitted in its inner circumferential wall 52a.

Inventors:

TANAKA JUNICHI
YAMADA HIROSHI
TAKAHASHI YOSHIYUKI

Application Number:

JP26144898A

Publication Date:

March 28, 2000

Filing Date:

September 16, 1998

Export Citation:

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Assignee:

MITSUBISHI HEAVY IND LTD

International Classes:

E21D9/06; (IPC1-7): E21D9/06

Attorney, Agent or Firm:

Takehiko Suzue (5 outside)

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