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[Example of Face Water Control Work] Hisakurizaka Tunnel

[Example of Face Water Control Work] Hisakurizaka Tunnel

Introduction of a case where the leakage of flow ends was resolved, preventing road surface freezing and leading to improved safety!

This is a case study of leak prevention work conducted at the Kurizaka Tunnel in Aomori City, Aomori Prefecture, using "surface drainage technology." Leakage from the spring line (SL) was causing the formation of ice pillars, which posed safety risks. Additionally, snow-melting pipes were installed on the sidewalk, making it difficult to manage water flow, necessitating effective countermeasures. To address the leakage from the SL, arch drain surface drainage was implemented, and side drains were installed for the drainage treatment of the water flow. The elimination of ice pillar formation meant that nighttime responses from management were no longer necessary, reducing the burden of maintenance. 【Case Overview】 ■Challenges - Leakage from the spring line (SL) was causing the formation of ice pillars, which hindered safety. - The presence of snow-melting pipes on the sidewalk made it difficult to manage water flow. ■Results - Nighttime responses from management were no longer necessary, reducing the burden of maintenance. - Leakage at the water flow was resolved, preventing road surface freezing and improving safety. *For more details, please download the PDF or feel free to contact us.

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[Example of Surface Water Works] Sado Circular Route, Taka Tunnel at Hage

[Example of Surface Water Works] Sado Circular Route, Taka Tunnel at Hage

Introducing a case where the installation of gutters in areas without leaks was minimized, while clarifying the drainage route and achieving effective water diversion measures!

This is an example of a tunnel leakage prevention construction project using "surface drainage" at the Taka Tunnel in the Sado Loop Line, located in Sado City, Niigata Prefecture. There were numerous cracks over a wide area at the top of the tunnel, leading to leakage. On the other hand, there was a request not to install drainage pipes in areas without leakage other than the top, necessitating efficient drainage measures. By installing a funnel-shaped catch basin between the side drain and the arch drain line, we were able to prevent water from pooling in the side drain, thereby improving drainage performance and reducing maintenance burdens. 【Case Summary】 ■Challenges - Numerous cracks over a wide area at the top of the tunnel were causing leakage. - There was a request not to install drainage pipes in areas without leakage other than the top, requiring efficient drainage measures. ■Results - We were able to improve drainage performance and reduce maintenance burdens. *For more details, please download the PDF or feel free to contact us.

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【Example of Face Water Control Work】 Sagawa District Tunnel

【Example of Face Water Control Work】 Sagawa District Tunnel

Introduction of a case where a transparent type of Arch Drain was used to implement extensive leakage measures in the tunnel of National Route 33!

This is an introduction to a case of leak prevention work in the Sagawa Tunnel in Sagawa Town, Takaoka District, Kochi Prefecture, using "face drainage works." There was a widespread occurrence of leaks within the tunnel, and there was a request to ensure that the flow of water could be visualized even after construction. By using a transparent type of arch drain, extensive leak prevention measures were implemented in the tunnel on National Route 33, making it easier to visualize the flow of water over a wide area, and allowing for proper drainage conditions to be confirmed even after construction. [Challenges] - Widespread leaks were occurring within the tunnel. - There was a request to ensure that the flow of water could be visualized even after construction. *For more details, please download the PDF or feel free to contact us.

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