Shield driving machine

Details Shield driving machine Shield driving machine

1998-11-03

2000-07-04

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

299 56, 299 58, 405138, 405141, E03F 306

Patent

active

060829303

ABSTRACT:
The present invention relates to a shield driving machine by which eliminates excessive work of the ground when working at a curved section while suppressing an increase of the sinking of the ground surface and securing a quickening in the stability of segments. In the shield driving machine, a bulkhead 16 is provided at the tip end side of the shield driving machine body 14 of the shield driving machine 10. The chamber 18 which is formed by the bulkhead 16 and has the tip end side open is filled up with excavated earth and sand and is used to oppose the earth pressure and water pressure in the natural ground. A rotating shaft 22 which supports cross-shaped spokes 20 penetrates on the center axis of the bulkhead 16. At the shield driving machine 10, a plurality of openings 24 which discharge a part of the excavated earth and sand supplied from the chamber 18 to the rear side of the shield driving machine body 14 are provided at the hood portion 27.

REFERENCES:
patent: 3979917 (1976-09-01), Crafton
patent: 4534676 (1985-08-01), Saito
patent: 4571122 (1986-02-01), Yamamoto et al.
patent: 5032039 (1991-07-01), Hagimoto et al.
patent: 5078545 (1992-01-01), Akasaka

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