EP 0334262 B1 19940112 - Method and apparatus for enlarging tunnels.
Title (en)
Method and apparatus for enlarging tunnels.
Title (de)
Verfahren und Gerät zum Erweitern von Tunneln.
Title (fr)
Procédé et dispositif pour l'élargissement de tunnels.
Publication
Application
Priority
IT 1992188 A 19880324
Abstract (en)
[origin: EP0334262A1] Method and apparatus for enlarging tunnels in service, characterised by installing a protection shield (60) within the original tunnel to protect through traffic (5) in the section of the tunnel involved in the enlarging operations, consolidating the section to be enlarged on a profile corresponding substantially to the extrados of the enlarged tunnel, demolishing the old lining down to the level of the direct bearings, demolishing the direct bearings and lining the enlarged tunnel.
IPC 1-7
IPC 8 full level
E21D 9/00 (2006.01); E21D 9/01 (2006.01); E21D 9/06 (2006.01); E21D 11/00 (2006.01)
CPC (source: EP)
E21D 9/01 (2016.01); E21D 11/003 (2013.01)
Designated contracting state (EPC)
AT CH DE ES FR GB IT LI
DOCDB simple family (publication)
EP 0334262 A1 19890927; EP 0334262 B1 19940112; AT E100176 T1 19940115; DE 68912167 D1 19940224; DE 68912167 T2 19940707; ES 2049769 T3 19940501; IT 1225765 B 19901126; IT 8819921 A0 19880324; JP H01315586 A 19891220
DOCDB simple family (application)
EP 89104960 A 19890320; AT 89104960 T 19890320; DE 68912167 T 19890320; ES 89104960 T 19890320; IT 1992188 A 19880324; JP 7072289 A 19890324