An Assessment of Stress State in Section of Steel Concrete Tunnel Lining Based on a Theory of Simultaneously Working Rings

The paper describes a method of setting up a stress state in a section of the steel concrete tunnel lining. This method evolves from the theory of simultaneously working rings. The theory provides for the evaluation of strain parameters of the steel concrete tunnel lining section as they change themselves in the course of lining construction. The evaluation of stress state in section of the primary lining depends on the stress modulus of the homogenized lining section and on the radial stress transfer coefficients, which are outputs of the simultaneously working rings theory. On the basis of this method, the tangential stress redistribution coefficients redraft the stress state of the homogenized lining section for the real stress state in constituent section materials of the steel concrete tunnel lining, i.e. in the steel elements and the shotcrete.