ニホン・ドレン List of Products and Services

This document is a column article explaining the drainage equipment "drainage gutters" that drain water leakage from joints and cracks in tunnels, underground structures, and buildings. It provides detailed information on the mechanisms and types of drainage gutters, such as linear drainage gutters and surface drainage gutters, as well as the history of drainage gutters and the differences between water stopping and water guiding. Water leakage can cause the concrete walls and surrounding areas to corrode, leading to the deterioration of the structure. Additionally, if there is moisture from water leakage, mold and bacteria can thrive, resulting in a musty smell and affecting the hygiene of the living environment. [Contents] ■ Mechanisms and types of drainage gutters ■ History of drainage gutters ■ Differences between water stopping and water guiding ■ Necessary functions of drainage gutters ■ Various applications of drainage gutters ■ Examples of drainage gutter installations to prevent water leakage in tunnels <video> *For more details, please download the PDF or feel free to contact us.

This document is a column article explaining "drainage pipes," a type of waterway that flows underground. It details the importance of underground drainage, the history of underground drainage, and various shapes of drainage pipes. It includes photographs and serves as a useful reference. Please feel free to download and take a look. 【Contents (partial)】 ■ What is a drainage pipe (underground drainage pipe)? ■ History of underground drainage ■ Introduction to the benefits of improving drainage ■ How is a drainage system constructed? ■ Where are drainage pipes used? Applications, etc. *For more details, please download the PDF or feel free to contact us.

This document is a column article introducing methods for draining and improving water accumulation in puddles. It provides detailed information on the reasons for poor drainage in grounds, how to drain accumulated water by yourself, and how to fundamentally improve drainage by hiring a contractor. If water accumulation in the ground is rare, you can refer to methods for draining it yourself. However, if water consistently accumulates and does not recede easily, consider hiring a contractor for a fundamental improvement. 【Contents】 ■ Causes of poor drainage in grounds ■ How to drain accumulated water from the ground by yourself ■ How to improve drainage by hiring a contractor ■ Summary *For more details, please download the PDF or feel free to contact us.

This document is a column article introducing three easy methods to improve drainage. It details the causes of poor drainage in gardens, such as "rainwater not penetrating clay soil," "uneven surfaces in the garden where water tends to accumulate," and "lack of proper water slope," along with simple improvement points. If you are struggling with poor drainage in your garden, please consider this as a reference. [Contents] ■ What is drainage? ■ Causes of poor drainage in gardens ■ Simple improvement points ■ If drainage still does not improve, consider hiring a professional ■ Summary *For more details, please download the PDF or feel free to contact us.

This document is a column article introducing the drainage pipes that are active in water purification plants. It provides detailed information on methods for drying sludge, such as sun drying and mechanical dewatering, as well as experiments comparing the performance of drainage pipes on sun drying beds. It includes photographs and serves as a useful reference. Please feel free to download and take a look. [Contents] ■ Water purification plants are facilities that produce drinking water ■ Sun drying beds for drying sludge ■ Drainage pipes active on sun drying beds ■ Comparison of drainage pipe performance on sun drying beds ■ Mitsuba drains active in water purification plants around the world ■ Summary *For more details, please download the PDF or feel free to contact us.

This is an introduction to a case of leak prevention work carried out by "Sen-do Water Works" at the Chidai Tunnel in Chidai Town, Ishikawa Prefecture. There was leakage from the joints and cracks in the tunnel, which posed a problem as dripping water affected passing vehicles and pedestrians. As a leak prevention measure, an Arch Drain AD026, which is resistant to cold, was installed at the leak points in the tunnel. With the installation of the drain, the leakage was prevented, and the dripping water no longer affected passing vehicles and pedestrians. 【Case Summary】 ■ Issue - Leakage from cracks was affecting passing vehicles and pedestrians. ■ Result - The installation of the drain prevented leakage, and passing vehicles and pedestrians were no longer affected by the water. *For more details, please download the PDF or feel free to contact us.

This is a case study of water leakage countermeasures in the Shimohanbara Tunnel located in Ono City, Fukui Prefecture, implemented by "water guiding works." Due to the small cross-section of the tunnel, the existing water guiding pipes were frequently damaged by contact with large trucks, leading to water leakage issues. The section of the tunnel wall where the box trucks were making contact was chiseled away, and the existing pipes were replaced with embedded pipes using Arch Drain Cold-Resistant Transparent (AD030 Cold-Resistant Transparent). By changing to an embedded type, the protrusion was eliminated, resolving the damage caused by contact within the tunnel and preventing water leakage. 【Case Overview】 ■ Issues - The small cross-section of the tunnel led to frequent damage of the existing water guiding pipes due to contact with large trucks (box trucks), resulting in water leakage. ■ Results - Changing to an embedded type eliminated protrusions, resolved damage caused by contact within the tunnel, and prevented water leakage. *For more details, please download the PDF or feel free to contact us.

This is an introduction to a case of leak prevention work using "line drainage" at the Sakaimi Tunnel on the Hokuriku Expressway in Niigata Prefecture. Water leakage occurred from the joints in the section where the tunnel's cross-section changes. Additionally, there was a 40mm step at the joint, and multiple lighting fixtures and racks were installed nearby, making it difficult to install arch drains, thus requiring effective countermeasures. By installing a 500mm side drain (SDS) and directing the water leakage from the joint to the drainage channel beside the tunnel, dripping onto the road was eliminated. 【Case Summary】 ■ Issues - Water leakage occurred from the joints in the section where the tunnel's cross-section changes. - Due to the step at the joint and the presence of multiple lighting fixtures and racks nearby, it was difficult to install arch drains. ■ Results - As a result of directing the water leakage from the joint to the drainage channel beside the tunnel, dripping onto the road was eliminated. *For more details, please download the PDF or feel free to contact us.

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.

This is an introduction to a case of leak prevention work conducted by "line-guided waterworks" at the Minotani Tunnel in Kamikawa Town, Hyogo Prefecture. Water leakage was occurring from the walls of the unlined shotcrete tunnel, causing dripping onto the road, which was a problem. By installing a shield drain at the leak points of the shotcrete tunnel, we were able to prevent the leakage, ensuring that dripping water no longer affected passing vehicles and pedestrians. [Case Summary] ■ Issue - Water leakage was occurring from the walls of the unlined shotcrete tunnel, dripping onto the road. ■ Result - By installing shield drains at the leak points, we prevented the leakage, eliminating the dripping water affecting passing vehicles and pedestrians. *For more details, please download the PDF or feel free to contact us.

We would like to introduce a case of leak prevention work in the Tonen Tunnel located in Tsuruga City, Fukui Prefecture, carried out by "Men-dousui Engineering." Due to corrosion of the existing galvanized steel plates (SI boards), their removal led to water leakage from the walls, which could potentially affect the surrounding healthy SI boards, necessitating new leak prevention measures. An arch roofing was installed to match the thickness of the existing SI boards, and caulking was applied at the joints to ensure water diversion. This also improved the appearance. [Challenges] ■ The existing galvanized steel plates (SI boards) were corroded, leading to water leakage from the walls upon removal. ■ There was a possibility of affecting the surrounding healthy SI boards, requiring new leak prevention measures. *For more details, please download the PDF or feel free to contact us.

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.

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.

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.