2021 Volume 77 Issue 1 Pages 10-21
The Ministry of Land, Infrastructure, Transport and Tourism is promoting the Infrastructure System Overseas Deployment Action Plan 2019. However, it has been pointed out that the cost of construction in Japan is higher than that of competitors. In this study, in order to contribute to the reduction of construction costs for Japanese companies abroad, some examples of construction in China was taken up. China is developing a large number of infrastructure exports in developing countries. And some differences in design concepts between Japan and China was summarized. Specifically, it will be introduced the method for determining the bridge length based on the bridge length of 20m pitch adopted by the bridge constructed on National Highway No. 8 on Cambodia. And it will be introduced the method for reducing the cost by unifying the girder length used on National Highway No. 6. When designing bridge on the flood plain, it is necessary to devise ways to minimize erosion around the embankment and abutments / piers due to flooding. It will be shown that the design concept adopted by China is more rational in terms of cost and maintenance than the cost reduction method based on Japan's bridge minimization scenario.
