Structural Characteristics and Design Method of In-suit Steel Framed Concrete Liner Suitable for Large Section Shield Tunnel

摘要

An innovative tunnel lining system has been developed with the aim of the application to a shield tunnel of large cross section. The present study verified the structural characteristics and design method of the proposed liner, and the degree of the filling of a concrete to the steel form. The studies confirmed the following: (1) For the design of bending and shear in the main member, the design method equal to that for reinforced concrete structure is applicable. (2) For the bending design of the joint member, the design method equal to that for the joint member of the RC segment is applicable. (3) As a result of the bending experiment of a test specimen by placing a concrete in the steel form on the assumption of actual construction, the filling of a concrete to a sealed steel form was found to be practicable.