EBARA Corp. (EBARA) completed the construction work for a large-scale exhaust fan installed in the Tanikawa shaft of the Kanetsu Tunnel, ordered by the Yuzawa Management Office of the Niigata Branch of East Japan Expressway Co., Ltd.
Kan-etsu Expressway Kan-etsu Tunnel Maintenance Work Completed on Large-Scale Exhaust Engines
1. Background
The Kanetsu tunnel, which connects the Kanto region and Niigata Prefecture, is the second longest tunnel in the country, extending more than 10 kilometers. This tunnel, which runs through Mt. Tanigawa, is said to have a steep rock wall and complex topography, is a major infrastructure facility that has been active in logistics and human traffic for more than 30 years, supporting industries and livelihoods.
2. Overview
The exhaust fan, one of the tunnel ventilation systems, plays an important role in ensuring an environment in which exhaust gas from passing vehicles can be ventilated and driven safely, and in discharging smoke to the outside in the event of a fire in the tunnel. The maintenance work was carried out at EBARA's Suzuka Plant in Mie Prefecture by transporting major equipment such as large impellers and electric motors for exhaust ventilation from the site. In addition, we inspected casings and other items on site.
Construction Specifications | Variable-pitch horizontal axial flow exhaust fan (AEKM type Φ3150mm×170m3/s×310kW Φ3150mm×165m3/s×335kW | 1 unit each |
| Construction period | August 4, 2021 to December 31, 2023 | |
| Construction site | Orenda, Minakami-machi, Tone-gun, Gunma Prefecture (Minakami IC) Kami-Tate, Oaza Yuzawa, Tōzawa-machi, Minamioguni-gun, Niigata Prefecture (Tōzawa Interchange) | |
3. Future Plans
The size of the domestic tunnel ventilation market is said to be about 3 billion yen per year, and demand for renewal of aging facilities and maintenance is also on the rise. EBARA has a history of more than 90 years in the field of blower and exhaust machine technology, and has a large number of domestic deliveries. Through the provision of a variety of products and services, we will continue to contribute to the development of social infrastructures that are safe and secure.
The EBARA Group will address material ESG issues based on its long-term vision and medium-term management plan in order to achieve the Sustainable Development Goals (SDGs) and further increase its corporate value.
※ "Type 〇〇〇" in the text indicates our model code.