Case and interview

Dreams about infrastructure maintenance

Toyoaki Miyagawa, Senior Professor, Kyoto University

In infrastructure maintenance for bridges, insufficient grouting and the accompanying ruptures in the tendons are serious problems. I would like the entire industry to combine its strengths to work on this.

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Manuals have been created for testing for prestressed concrete tendon ruptures using the flux leakage method

Nexco-East Engineering Co., Ltd.
Hisamitsu Kitanosono

The effects of salt damage in prestressed concrete internal tendons proceed quietly, and sometimes by the time we notice, the situation is already very serious. To prevent this, non-destructive inspection of the prestressed concrete internal tendons is important. NEXCO has listed the flux leakage method in its survey outline as a method for this.

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SenrigaN, the outcome of efforts “that were challenging, that nobody else thought to create”

Kōji Yoshida,
Central Japan Railway Company

Until now, methods for testing internal steel tendons without destruction lacked a decisive hit. My impression is that at last, a powerful option has been created.

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Expectations for SenrigaN in local government infrastructure maintenance

Fukuoka City

We have been looking for a technology that will allow us to test efficiently while keeping costs low in inspections of bridges, which will continue to age and wear in the future.

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SenrigaN’s reliability and efficiency as seen in actual use

Terada, Eight-Japan Engineering Consultants, Inc.

When adopting new technology, it is important to have performance showing that it is highly accurate and reliable, in particular. We also present a technology comparison chart that we actually proposed to managers, after confirming reliability through on-site use.

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Creating customer-based solutions that have grown into technologies focused on and making use of on-site installations through demonstrative experiments

Hori, West Japan Railway Company

Able to be used on site, not in a laboratory; easily portable; enabling immediate confirmation of results— this is what is highly regarded.

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Highly accurate and practical SenrigaN, “completely different” to previous magnetic measurement

Yasushi Tanaka, Professor, Kanazawa Institute of Technology

From experiments to date, I was skeptical about non-destructive inspection, but it was highly accurate, contrary to my expectations. SenrigaN will change the reliability of bridge maintenance.

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