Shield driving machine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 4, 2000
Grant Date -
N/A
app pub date -
Nov 3, 1998
filing date -
Nov 27, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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