ETUDE SIMPLIFIEE DU FLAMBAGE D'UN REVETEMENT MINCE LORS DU CREUSEMENT D'UN TUNNEL AU BOUCLIER
Construction of tunnels in loose ground often requires shield tunnelings, in which the tunnel lining is compressed axially by the forwards thrust of the shield. The stability of this lining is studied in relation to buckling under axial compression, taking account of lateral ground reaction. The problem is studied analytically and in a simplified way. It is shown that the critical force needed to cause buckling does not depend on the length of lining deposited behind the shield, and that good ground - lining continuity is a basic requirement if we wish to guarantee the safety from buckling of a thin lining deposited behind a shield in loose ground. Finally, provided that certain precautions are taken, the conclusions of this study can also be applied to "push tube" tunneling.
Références bibliographiques: TUNNELS ET OUVRAGES SOUTERRAINS, NO. 65 (1984), PP. 201-204
Numéro d'enregistrement: 1989123087800 / Dernière mise à jour le: 1987-01-01
Langues disponibles: fr