A Study on Planning Process of Large Scale Infrastructures

本研究旨在使战后土木工程项目，即大型基础设施，在未来得到公平的评估。虽然到目前为止对土木工程遗产进行了评估，但这些设施在1945年之前是有限的。本研究以1945年后的大规模基础设施为研究对象。收集并保存了阐明策划过程的文件，并对存在的利益相关方进行了访谈调查。计划建设的基础设施包括：精干隧道、小丸运河、八幡填海、忠上河电力开发、大都会高速公路、美新高速公路、跨东京湾高速公路、成田机场、东海道新干线、本州-四国大桥、关门大桥和隧道。日本各地的研究参与者研究了这两个端点。本研究的主要成果如下：(1)社会环境变化在规划时和规划后是协调一致的。2)在大型社会基础设施评价中，除了经济指标外，土木工程历史评价也很重要。3)对于大规模基础设施的规划和实现，需要可靠的共识建立过程。

This study aims that postwar civil engineering projects, that is large scale infrastructures, are evaluated fairly throughout the future. Though evaluations of the civil engineering heritages have been carried out until now, these facilities have been limited before 1945. This study is, taking up the large scale infrastructures after 1945. The documents which clarified the planning process were collected and saved, and the interview surveys for the interest parties who exists were carried out. Intended infrastructures are Seikan Tunnel, Otaru Canal, Hachirougata reclamation, Tadami River electric power development, Metropolitan Expressway, Meishin Expressway, Trans-Tokyo Bay Highway, Narita Airport, Tokaido Shinkansen, Honshu-Shikoku bridges, Kanmon Bridge and Tunnel. Research partakers all over Japan have studied each end.Main accomplishments by this study are as follows.1) Social environment changes were coordinated in the time of planning and afterwards. 2) The following were shown in evaluation of large scale social infrastructures : Not only economical index but also civil engineering historical evaluation is important.3) For planning and realization of the large scale infrastructure, it was shown that reliable consensus building process was necessary.