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  6. [Example of Water Conduction Work] Shadow Path Tunnel

[Example of Water Conduction Work] Shadow Path Tunnel

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last updated:Jul 11, 2025

ニホン・ドレン
ニホン・ドレン
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We will introduce a case where a seal drain was installed to cover the water leakage next to the steel plate, and the construction was carried out to direct the water to the shoulder.

This is an introduction to a case of leak prevention work conducted by "Sen Dousuiko" at the Kageji Tunnel in Ono City, Fukui Prefecture. At the site, water leakage was occurring from the side of the existing steel plate (5mm thick). On the other hand, since the removal of the existing steel plate was not possible and the tunnel cross-section was small, there was a request to minimize protrusion from the wall, necessitating effective countermeasures. By installing seal drains, we were able to prevent water leakage, eliminating dripping onto the road. [Challenges] ■ Water leakage was occurring from the side of the existing steel plate (5mm thick) ■ Removal of the existing steel plate was not possible ■ Due to the small tunnel cross-section, there was a desire to minimize protrusion from the wall *For more details, please download the PDF or feel free to contact us.

    Renovation and repair methods
事例まとめ記事_線導水5-768x804.png

[Example of Water Conduction Work] Shadow Path Tunnel

事例まとめ記事_線導水5-768x804.png
事例まとめ記事_線導水5-768x804.png
  • Related Link - https://www.n-drain.co.jp/column/content/1546
  • Special site - Product/service details - https://pr.www.ipros.com/n-doren/product/

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【Results】 - By installing seal drains, we were able to prevent water leakage, eliminating dripping onto the road. - Only screw holes were needed for drilling into the steel plates, and there was no need to create anchor holes like with arch drains, making the installation easier. *For more details, please download the PDF or feel free to contact us.

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Comprehensive Catalog of Japanese Drains for Water Conduits and Underground Drainage Materials

Comprehensive Catalog of Japanese Drains for Water Conduits and Underground Drainage Materials

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2025 Good Design Award" winner! Mitsuba Drain has also been selected as "My Chosen Item.

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The announcement of the 2025 Good Design Award (organized by the Japan Design Promotion Association) was made on October 15, 2025. This time, Nihon Doren Co., Ltd. received two Good Design Awards. Additionally, the focused drainage pipe "Mitsuba Doren" was selected for the special selection "My Chosen Item" by the Good Design Award judging committee. It has been highly evaluated as an excellent design that merges traditional wisdom with modern technology.

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ニホン・ドレン

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Building materials, supplies and fixtures manufacturers

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Founded as a manufacturing company for drainage pipes and underground drainage systems, we at Nihon Doren believe it is our mission to address the diverse needs related to safety and security, such as the maintenance and preservation of structures and environmental measures, even as social environments change. We have set forth our purpose as "Eliminating water-related troubles from around the world through innovative manufacturing and heartfelt activities." With the mission of "Pursuing the best and solving problems at the fastest pace as professionals in drainage," each of our employees will continue to engage in creative thinking and challenges for the development of better products and new applications.

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