| Popis: |
This study, using GeoFBA, generates a load-structure method tensile-compressional model for analyzing and calculating the tunnel that is 10m deep embedded by rock and is eroded by combined action of sulphate and chloride. The calculation indicates that first of all, the tunnel safety falls down gradually with the increase of circumferential crack width (the degree of corrosion of reinforcement) as well as longitudinal crack depth; furthermore, when lining suffers the same corrosion degree of reinforcement and the same depth of longitudinal crack, the problem occurs on the arch crown which would bring up bigger effect to the tunnel safety than that occurs in the haunch; In addition, the change of circumferential crack width, which is smaller than 0.2mm, would make less influence to the tunnel lining safety. |
