In this study, we have an object to investigate the piping system buried in the ground at ground subsidence. Therefore, we conduct bending test of bellows pipes for buried piping using experimental equipment which is simulator for assumed ground subsidence. Grade of bellows pipe is stainless steel. We measure load and displacement and calculated stress and strain appeared at bellows pipe. We conduct bending test at four kinds of experiment conditions for outer surface of bellows pipe, that conditions are non-restraint, soil or gypsum are filled around outer surface of bellows pipe, buried piping system is set in the box in which soil is filled. By analyzing these experimental results, we clarify deformation characteristic of bellows pipes for buried piping at ground subsidence, and we verify the application of bellows pipe to buried piping.

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