抄録
In order to reduce the construction cost of a shield tunneling, it is required to develop the rational segment structure. We have studied and developed “bolt-boxless Flat Segment” which has no exposed metal connectors in the internal surface of the lined area. By applying this segment to shield tunnel, it will be possible to omit secondary linings. This paper describes the concept of bolt-boxless Flat Segment and estimates flexural and shear rigidity of joint based on the result of segment loading test. From the test results, it is confirmed that flexural rigidity is different in response to the shape of joints and the numbers of metal connectors.
