Introduction of the Advanced Civil Engineering technologies of the Western Countries in the Modernized Japan

从2003年到2006年的三年时间里，我们研究了(1)对国外土木工程遗产的实地考察，(2)国内外资料的收集和分析，包括日本土木工程遗产的最新选择。通过这些考察，我们获得了有助于构建日本土木工程历史新方案的各种重要信息。鉴于(2)，我们继续收集关于大坝、港口、悬索桥和混凝土桥梁的各种数据。以大坝为例，通过将其分为重力型(直线型和曲线型)、拱型和扶壁型四类，我们可以得到一个关于“技术的必然性和技术的接受/拒绝”的轮廓。在港口方面，我们把重点放在沉箱式防波堤和桥墩上，可以确认20世纪30-40年代的沉箱结构水平达到了世界顶尖水平。在桥梁方面，我们也证实了悬索桥和混凝土桥技术在日本引进后出现了不同的发展。最后，我们可以在《日本土木工程遗产：作为1865-1945年日本现代化纪念碑的2000年重要建筑》名单上增加一些有益的数据。

Over a period of three years between 2003 and 2006, we have studied about (1)on-site inspection of foreign civil engineering heritage, (2)collection of internal and foreign data, and their analysis, including the newly selection of Japanese civil engineering heritage.Concerning (1), we have visited twenty of important bridges, dams and canals in USA, one important dam in Sakhalin, and ten of important stone breakwater, suspension bridges and concrete bridges. Through these inspections, we have gotten various important information which were valid to construct a new scheme of civil engineering history in Japan.Concerning (2), we have continued to collect various kinds of data on dams, harbors, suspension bridges and concrete bridges. In case of dams, we could get an outline on "the inevitability and acceptance / rejection of technology" by classifying into four categories, such as, gravity-type (straight and curved), arch-type and buttress-type dams. In case of harbors, we have focused on the caisson-type breakwaters and pier, and could confirm that the level of caisson structures in the 1930-40s was reached at the top-level in the world. In case of bridges, we have also confirmed that the technologies of suspension and concrete bridges showed different development in Japan after they were introduced. And finally, we could add some profitable data on the list of "Civil Engineering Heritage in Japan : Important 2000 Structures as Monument of the Modernized Japan 1865-1945".