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活動報告(公募計画コース) 第90号

「新規建設から維持管理へ」中国の土木系大学生と共に学ぶ
長崎大学からのレポート

長崎大学

 8月24日~8月31日の1週間、さくらサイエンスプランの支援を受けて、中国山東大学土木工学院に所属する学生9名と教員2名を長崎大学に招聘しました。

 中国をはじめとするアジアの新興国では近年著しい経済発展とともにインフラ整備がハイペースで進められています。それとは対照的に、日本では高度経済成長期から発足した大規模なインフラ整備が一段落し、土木業界の重心は新規建設から既存インフラ施設の維持管理へ移りつつあります。

 長年蓄えてきた建設技術を新興国へ普及させていくこと、また、現在発展している維持管理技術と経験を今後他国で参考にしてもらうことが国際貢献という観点から大変有意義なことです。そのため、今回は土木を専門とする中国の学生達を招聘しました。

 今回の交流プログラムは「土木建設技術」と「インフラの維持管理」の2つの研究テーマから構成されました。前者は主にトンネルや橋梁などの構造物に関する最新の建設技術の理解、後者は主に既存のインフラ施設の維持管理に関するモニタリング技術や補修・補強技術の学習を目指しました。教員による講義に加えて、現場見学、システム体験、長崎大学の大学院生との交流なども盛り込んだプログラムとなりました。


長崎新幹線トンネル建設現場の見学


本コースの教員による講義


雲仙普賢岳噴火被災地の見学


建設現場の説明を受ける様子

 最後に、このような貴重な機会をご提供いただきました科学技術振興機構に心よりお礼申し上げます。

以下に参加した学生からの感想文を転記します。

It’s quite an amazing journey in Japan, as well as an unforgettable experience of this summer! Many things in Japan are all new to Chinese students who have never been here before, such as me. The warm, humid oceanic climate and the neat and clean streets shocked me through my eyes at the moment we landed at Fukuoka airport. Japanese citizens of all ages seem to have a perfect sanitation concept. They strictly obey the rules of rubbish classification to make them fully used. Almost each Japanese follows the rules so that the whole country becomes a livable paradise for more than one hundred million people. However, the same thing, for my view of sight, is incredible in China, and that’s what we should learn from Japanese for every people.

Nagasaki is quite a beautiful harbor city. As the only open port to the world of the entire country in a long time of history, Nagasaki is full of traces of foreign cultures, religions and business. Christian church stands on the hill, while the Confucian temple locates in the street corner. All kinds of food can be found at the numerous restaurants in Nagasaki.

We arrived at Nagasaki University on the second day. The school of engineering is located in the center of the nice campus. It is our destination of this trip. Prof. Jiang, Dr. Li, and several senior doctor students treated us with the utmost cordiality. After the schedule and accommodation were arranged by Dr. Li, Prof. Jiang gave us the first lecture. He detailedly introduced the Nagasaki University, his research group and their programs to us. His works on geotechnical theories are quite precocious.

Meanwhile, the theory combines well with the local engineering problems, such as the pipeline settlement in the construction of Nagasaki Tunnel. The combustible ice beneath the seabed is a hot topic in the whole world, especially in the countries with limited resources like Japan. Prof. Jiang expounded their studies on how the exploitation process of combustible ice will affect the seabed environment in several aspects. Dr. Li added more specific works of their group on the research programs, and he communicated with us in some topics that we were interested in.

We visited the construction site of the east New Nagasaki Tunnel under the guidance of Prof. Jiang. The engineers there provided all the props and devices that we can imagine. Their rigorous spirit impressed me deeply all through the visitation. I have never imagined before that a construction site and the project office can be much cleaner than my home. Order exists everywhere. They use the ordinary techniques and crafts that are also used in China in the tunnel construction, but their quality and preciseness obviously overpass ours.

On the last day in Nagasaki University, Prof. Ogawa and Prof. Tada came to give us lectures about their researches. Prof. Ogawa has researched on the technology of remote sensing and its application for years. He showed us the images of coral reef distribution in a sea area near Nagasaki and introduced that his new technique makes this work much easier and almost free. Prof. Tada is a seriousminded scholar. He exhibited his numeral analytical works to us and expounded his theory in detail. Some looks too complicated to us but we indeed learned much from his advanced works.

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