The establishment of application technology for high valued timber components using driftwoods results from disasters

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K04956
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 25030:Disaster prevention engineering-related
• Research Institution: Fukuoka University
• Principal Investigator: WATANABE HIROSHI 福岡大学, 工学部, 教授 (60244109)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 流木材 / 木材利用 / 災害復旧

Outline of Final Research Achievements

Effective utilization method of driftwoods were investigated. Destructive tests were carried out on order to estimate damage levels due to flowing down. Specimens were derived from flow down lumber, fallen tree in forest land and lumber drifting to dam. As a result, is was founded that strength deterioration was slightly to select in good condition visually. A little sand entering cracks is bring damaging saw blade and factory fire. Sawing driftwoods on an elementary mill without dust collector can only solved this problem.
As abundant driftwoods are generated at one-time flood damage, it is desirable that a large demander is near a disaster recovery. Rock fall protection works using driftwood were examined.

Free Research Field

土木工学

Academic Significance and Societal Importance of the Research Achievements

流木材の強度試験を示すことで、流木材が用材として十分利用できるポテンシャルを持っていること、それは簡単な目視評価により選別が可能であることが明らかになった。製材における課題を解決することは困難であったが、最小限の加工により用材利用方法を示すことができた。本研究成果により、流木の劇的な用材利用が進むものではないが、高付加価値の利用法が示されることでその処理コスト全体が押し下げられることが期待される。また、それらが流木発生地ででもある被災地で利用されることで、復旧のシンボル的な存在になり得ることの他、現地での環境負荷の低減に資することも期待できる。