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The two-hinge precast arch culvert has a hinge function in its main body. Thus, it harnesses subgrade reactions positively, by permitting deflection, and becomes a mechanically stable structure. Compared with a box culvert, which supports external forces by the rigidity of the member, the thickness of the members of this two-hinge precast arch culvert is small. However, because the design of the two-hinge precast arch culvert is entirely different from that of a conventional culvert, the mechanical behavior of the culvert has become an important issue. The authors conducted 1/5 scale model tests to investigate the deformation behavior in the construction stage and the seismic performance of a two-hinge precast arch culvert. In this study, the relationship between the deformation of the culvert and the earth pressure acting on the culvert during the construction process is discussed.

Relationship between deformation and earth pressure of two-hinge precast arch culvert in construction process through model experiment