Tunnel-boring machine and method of using the same
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Aug 13, 2002
Grant Date -
N/A
app pub date -
Feb 11, 2000
filing date -
May 27, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The tunnel rock drill (100) for driving a tunnel bore optionally in open or shielded mode comprises a shield tail (33), which is connected to the drill head (10) and which covers optionally the bore wall over a defined length; a bracing device (20), which can be optionally fixed in the tunnel bore; at least one optionally activaatable advancement device (25), which, on the one hand, rests on the bracing device (20) and , on the other hand, acts on the drill head (10); and an optionally activatable force generator (35), which has a variable length and which, on the one hand, rests on a tubbing support (32) and, on the other hand, acts on the drill head (10). To introduce the advancement forces into the drill head in open mode, there is an inner kelly (16), which can be moved in the direction of boring in relation to the bracing device (20) and to which the advancement generator (25) is hinged and whose breast-sided end bears the drill head (10).
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