Abstract
In TBM tunneling, the installation of segmental liner, which can support both thrust force for the machine and earth pressure for tunneling, is effective for safe and rapid excavation when the rock is weak and/or the excavated roof collapses frequently. This paper describes the development of new type segmental liner that is relatively cheap and easy to install compared to the conventional segments for shield tunneling.
The liner has composite structure of steel shell and filled concrete. Each pieces are jointed without using bolts to reduce installation time. In order to establish the design method for this liner, loading tests on full scale pieces were performed and the results were evaluated using numerical analysis.
