A submerged floating tunnel (SFT) must have enough strength to resist to various external loadings suchudas bending, torsion, tension, and compression. The expected main deformation of SFT is caused by bending moment.udAnd this bending moment makes tensile stress and compression stress on the wall of SFT. Thus, bending moment is audmain affecting factor on the safety of SFT. Until now, a reinforced concrete tunnel was suggested for SFT by otherudresearchers. In this study, an internally confined hollow reinforced concrete tunnel and a double skinned compositeudtubular tunnel were proposed. And their bending strengths were studied and compared with that of a reinforced concreteudtunnel. The analysis results showed the proposed SFT structures had enough strength to guarantee safety.
展开▼
