INVESTIGATION ON INSTALLATION METHODS OF CAST-IN-PLACE CONCRETE PILES IN JAPAN FROM THE LATE MEIJI TO EARLY SHOWA PERIODS

This paper describes the construction methods and applications of cast-in-place concrete piles invented in Europe and the United States during the dawn and early Showa Period when they were introduced to Japan. Compressol piles were first introduced to Japan. Simplex piles, Raymond piles, Pedestal piles, and Franki piles were subsequently introduced. Pedestal piles were improved in the U.S., and further improvements were made in Japan. The Tanaka-style concrete pile was also invented and has been applied to many buildings. These piles are still supporting many historical buildings more than 100 years.