靑銅器時代 柱穴 考察

Abstract

I supposed the timber was used through observation and review of column holes found in Bronze Age dwellings. An experimental archaeological method was tried to verify this.For all ages and countries, the timbers used in prehistoric architecture are mostly tall trees, shrubs and bamboo. Poaceae is also widely used. There are differences in logging according to the characteristics of the timber. A tall tree is felled in a ‘V’ shape, and abamboo is cut in a ‘凵’ shape. I have set up the hypothesis that depending on the building material’s logged form, the posthole would likely be confirmed in the same format. Bronze Age houses are divided into early square houses and circular ones. As a result of the examination, it was confirmed that the square type dwelling was a "V" type posthole, and the circular type dwelling was a " " type posthole. Therefore, I set up the possibility that the square system used tall trees as pillars and the circular system used them. In addition, the Bronze Age’s settlements are moved to hills in the former part and alluvial lands due to the spread of rice cultivation in the latter part. The alluvial land, which was lowland compared to hills, was easy for farming. However, the area is vulnerable to natural disasters such as floods. Therefore, the housing form and building materials would have had to change in conjunction with this. In other words, rather than saving trees from hills far from alluvial plains, it is more likely that bamboo, distributed closer to where they live, was used as a building material. As described above, the differences in the timber used as a building material were examined by examining postholes. I also briefly mentioned the changing factors about form of housing in the Bronze Age.