The compaction characteristics of embankment sand as construction materials for the Tokyo Bay Fortresses built in the Meiji and Taisho periods, and the strength and deformation characteristics of concrete, bricks, and rocks were examined. The average spreading depth of the sand used for reclamation of the First fortress was 18 cm, and although specifications were specified according to the standards of the time, it was sand subject to liquefaction. The strength and deformation characteristics of stone, brick, and concrete, such as secant Young’s modulus, Poisson's ratio, and fragility coefficient, were related to dry density and unconfined compressive strength, and regression equations useful for the soundness and future maintenance of civil engineering historic sites were obtained.
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