The structural analysis of damaged tunnel lining reinforced by steel plate

Abstract

The structural analysis was carried out to investigate the behavior of damaged tunnel concrete lining reinforced by steel plate. Steel plate is thin compared with existing concrete lining, then the effect of such plate is not yet made clear. Computer analysis by finite element method (FEM) was executed including surrounding ground, so that the interaction between tunnel lining and ground can be considered.
Assumed damaged concrete lining types were hinged condition and lack of lining at tunnel top section. Under such damaged conditions, effect of steel plate thickness was studied. As a result, thin steel plate is sufficient under the condition of tying steel plate with damaged concrete lining.