Development and Operation of Non-Destructive Inspection Device for Inspection of Stay-Cables─Self-Propelled Stay-Cable Inspection Device─

斜材点検用非破壊検査装置の開発と運用─自走式斜材点検装置─

The stay-cables of cable-stayed bridges and extradosed bridges being located at relatively large heights, there are many places where visual inspection is difficult because it requires aerial work vehicle for close visual inspection or rope access technology. Further, the high-strength steel wire used for stay-cables is at risk of corrosion due to penetration of degrading agents or the like, as well as fatigue rupture caused by stress fluctuation, but inspection for damage of such steel in protective pipes requires effective non-destructive inspection equipment. This paper describes a self-propelled diagonal member inspection device developed to allow the visual inspection of diagonal members in high locations and the detection of damage in high-strength steel members. 斜張橋やエクストラドーズド橋の斜材は,比較的高所にあることから,近接目視による点検に高所作業車が必要になったり,ロープアクセス技術が必要になったりして,目視点検が困難な箇所が多くある。また,斜材に用いられている高強度鋼線は,劣化因子の侵入などにより腐食したり応力変動により疲労したりして破断するおそれがあるが,保護管内の鋼材の変状を点検するためには,効率的な非破壊検査機器が必要となる。本稿では,高所にある斜材の目視や高強度鋼材の変状を簡便に調査することを目的として開発した自走式斜材点検装置について述べる。</p>

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  • Accession Number: 01681020
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Aug 1 2018 3:01PM