クレーンの震災復旧

摘要

2011年3月11日に発生した東日本大震災は，観測史上最大のM9.0の巨大地露となった。該当地区で稼働していた荷役機械は地震と津波により多種多様な被害を受けた。住友重機械搬送システム株式会社(旧 住友重機械工ンジニアリングサービス株式会社)が製作した荷役機械では岸壁損傷，船舶との衝突，浸水および浮遊物衝突による損傷被害が多かった。 復旧作業に当たってはライフラインの確保，余震による作業中断および避難など多くの困難があった。また岸壁設備などの荷役機械以外の復旧作業が同時期に実施され，その都度工程調整を実施した。 震災から2年半が経過し，多くの住友重機械搬送システム製の荷役機械が復旧し稼働している。荷役機械の震災復旧を行ったことは貴重な経験となり，今後は地震対策の検討が必要であると認識した。%The Great East Japan Earthquake measuring magnitude 9.0, which is the strongest earthquake ever recorded in Japan, occurred on March 11,2011.Many material handling machines that were operating in the stricken areas were variously damaged by the earthquake and tsunami. As far as those machines made by Sumitomo Heavy Industries Material Handling Systems Co., Ltd. (the former Sumitomo Heavy Industries Engineering Service Co., Ltd.) are concerned, damages were caused by broken quays, collisions to vessels, flooding, or collisions to wreckages. We had to face up with many obstacles such as difficulties with securing lifeline, interruptions and evacuations due to the aftershocks. The quays were to be rebuilt at the same time. Therefore, we repeatedly reviewed and readjusted process of repairing damages of the machines. After two and half years have passed, many of the material handling machines made by SHI have been rebuilt and are working properly. It was valuable experience for us to have repaired the earthquake-related damages of the material handling machines, because it helped us to appreciate the needs to discuss how to take countermeasures to protect the machines from earthquake.