THE DURABILITY OF WOODEN PILES WHICH HAD SUPPORTED THE TOKYO MARUNOUCHI STATION

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  • 東京駅丸の内駅舎に使用された木杭の耐久性

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 Wooden piles had been applied to foundations of railway viaducts and station architecture since later 19th century, Meiji Era. It is well known that wooden piles have not been decayed and durable for over 100 years in case they exist in groundwater or clay soil layers by past studies and reports. On the other hand, wooden piles might be decayed in case that they exist above groundwater level, and in sand soil layers. This report says that wooden piles have not been decayed severely by the real wooden piles dug in reconstruction work Tokyo Marunouchi Station building, even though they exist above groundwater level, where clay or soil layers lie. And we try to identify the producing area of wooden pile for foundations of Tokyo Station by the record of construction and timber production report. This study says the probability that wooden piles for Tokyo Station had been made in Noheji District in Aomori , and the kind of wood is so called “Kacchi-Matsu (pine)” is very high.

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