抄録
Civil engineering structures in general used to put more greater value to economics and rationality than to design style except in the case of bridge construction. But recently, the engineering interest has increasingly core to turn to landscape planning, specifically styling in their design, and now the relevant problems are beginning to be better understood. It was felt as important in planning for preservation or restoration of heritage of old structures that design features in their styling be preliminarily surveyed in detail. From this point of view, this paper purports to characterize and classify the existing tunnel portals. The object of this study was railway tunnels constructed by government or private railways in the period from Meiji to Taisyo Era in Kinki district, specifically the features of their portals to be investigated through external observations in detail. The findings from the survey may be summarized as follows;(1) the tunnels investigated feature a wide variety of portal styles;(2) the features depend on difference in the line or length of tunnel as well as in the age built; and (3) some decorative details exhibit distinctive techniques of high quality.
