Reinforcement system for the concrete lining of the inner shell of a tunnel construction

A self-supporting reinforcement system for a concrete lining of an inner shell of a tunnel construction, the reinforcement system comprising:

• tensioning arches or tensioning rings with an adaptable arch length or an adaptable ring circumference, the tensioning arches or tensioning rings each including at least two arch segments defining a tunnel reinforcement arch or tunnel reinforcement ring for reinforcement of the inner shell of the tunnel construction for support for at least one outer layer of reinforcement steel meshes, wherein the arch segments are each formed from an individual reinforcement steel rod, and the individual reinforcement steel rod is configured to be directly disposed against the outer layer of the reinforcement steel meshes,
• tensioning support bodies each having a connecting region configured to receive the tensioning arches or tensioning rings, and at least one support arm, for tensioning the tensioning arches or tensioning rings on an outer shell or rock face wall of the tunnel construction in a supporting manner and producing a spacing with respect to the outer shell or to the rock face wall,
• first spacers on the tensioning support bodies for support on the outer shell or rock face wall of the tunnel construction and for generating a minimum concrete coverage of installed reinforced concrete parts, and
• second spacers between the outer layer and an inner layer of the reinforcement steel meshes,
• wherein the tensioning arches or tensioning rings are configured to be expanded and tensioned against the tensioning support bodies to apply a force to the first spacers against the outer shell or rock face wall of the tunnel construction.