Case Study: Leak and Spalling Prevention "Miedoren" Tunnel Repair Work in Fukui Prefecture
[NEXCO standard compliant] A key product of Miedoren that combines water leakage prevention and spalling prevention, contributing to water leakage measures for tunnels, culverts, etc.
We would like to introduce a case study of the installation of the water guide pipe "EF-385 Standard Transparent Type" for the repair of tunnels in Fukui Prefecture. In this tunnel, water leakage occurred from the joints and cracks in the lining surface due to aging. Particularly in winter, freezing could lead to slip accidents, and because there were numerous leakage points, other construction types faced the possibility of prolonged work. With this product, water leakage can be directed to the drainage channel without adversely affecting passing vehicles or pedestrians. 【Case Overview】 ■ Issues - Water leakage occurred from the joints and cracks in the tunnel lining due to aging. - Water that leaked onto the road could freeze in winter, leading to slip accidents. - Due to the numerous leakage points, other construction types (such as crack injection) faced the possibility of prolonged work. ■ Reasons for Adoption - Compared to other construction types, it can be installed in a short period. - It can serve both as a water leakage countermeasure and a peeling prevention measure, making it economical. - Since it can be processed on-site, it can be installed without removing or relocating existing structures. - By adopting the transparent type, visual inspections can be conducted after installation. *For more details, please refer to the PDF document or feel free to contact us.
basic information
【Adopted Construction】 Tunnel Repair Work Tunnel Maintenance Work Culvert Repair Work Underpass Repair Work Road Repair Work Other Various Repair Works 【Features】 ■ High robustness due to the integration and fixation of each component with anchor bolts ■ The anchor bolts used are of the "wedge type," allowing for secure installation and management ■ The water guide plate uses flame-retardant rigid PVC, providing impact resistance and load-bearing capacity ■ By using a transparent type for the water guide plate, visual inspection after installation is possible ■ Suitable for cold regions by using a cold-resistant type ■ Easy installation work allows for construction in a short period ■ Complies with the NECXO small fragment fall prevention test standards (Tunnel Construction Management Guidelines) ■ Simultaneous measures for water leakage and fragment fall prevention are possible ■ Over 800 implementation records, mainly with government agencies and NEXCO (total for the last 10 years) *For more details, please refer to the PDF materials or feel free to contact us.
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Applications/Examples of results
【Recommended for the following individuals】 ■ Public institutions, NEXCO, railway companies - Infrastructure maintenance management departments ■ Construction consultants registered in either "tunnels," "steel structures and concrete," or "roads" ■ Prime contractors who have received (or plan to bid for) repair work for tunnels, culverts, etc. *For more details, please refer to the PDF document or feel free to contact us.
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CAD data（2）
| Model number | overview | File |
|---|---|---|
| EF Series Standard Use | In addition to leak prevention measures, a water guide gutter that also complies with anti-falling measures (NEXCO standards). It is the most widely adopted product and a standard product that accommodates various sites. |
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| EF Series Cold Resistant | In addition to leak prevention measures, a water guide trough that also complies with the NEXCO standards for debris removal. It directs water to the outlet without freezing leaks even in cold regions. |
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