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Delivered ventilation equipment to the Yokohama Northwest Line tunnel on the Metropolitan Expressway’s Yokohama Loop Line


2020.03.25
EBARA Corporation

Φ2800 mm horizontal axial flow exhaust Φ2800 mm horizontal axial flow exhaust
Φ1250mm jet fan Φ1250mm jet fan

EBARA Corporation (hereinafter referred to as EBARA) has delivered ventilation equipment to the ventilation plant and tunnel of the Yokohama Northwest Line (hereinafter referred to as the "Northwest Line") under contract from the Metropolitan Expressway Corporation.

1. Background and Objectives

The Northwest Route of the Yokohama Circular Route, which forms part of the road network of Yokohama, Kanagawa Prefecture, is a 7.1-km long road that connects the Yokohane Route on the coast and the Tomei Expressway inland. By improving access to the Tokyo metropolitan area, this route improves logistics efficiency and helps to curb traffic congestion on local roads. Ventilation equipment has been installed in the tunnel section to improve the environment inside the tunnel, be considerate of the surrounding environment, and ensure safety in emergencies.

2. Overview

In the tunnel, air volume, wind speed, the concentration distribution of substances in the air, and pressure balance are constantly changing. EBARA has built a sophisticated ventilation control system that conducts repeated calculations based on these factors, achieving efficient operation of the individual ventilation systems to match the environment in the tunnel. Because the Northwest Route is located in an urban area, in consideration of the surrounding environment, EBARA also supplied silencers to reduce the operating noise of the exhaust fans.

 

Overall
1ClientMetropolitan Expressway Co., Ltd.
2Project name(Negative) Construction of tunnel ventilation equipment for the Yokohama Circular Northwest Line
3Construction PeriodFebruary 21, 2017 - March 10, 2020
4Ventilation methodCentralized exhaust longitudinal ventilation system
Each facility
 Facility NameFacility NameNumber of unitsSpecification
1East Ventilation StationExhaust and ventilation equipment2 unitsCaliber: Φ2800mm
Air volume: 151m3/s
Wind pressure: 2100Pa
Motor output: 490kW
Silencer EquipmentComplete set
Loading and unloading equipment
Switchboards
Automatic ventilation control device
Other incidental facilities
Complete set
2Kitahasaku Ventilation StationExhaust and ventilation equipment2 unitsCaliber: Φ2800mm
Air volume: 145m3/s
Wind pressure: 2100Pa
Motor output: 470kW
Silencer EquipmentComplete set
Loading and unloading equipment
Switchboards
Other incidental facilities
Complete set
3Inside the tunnelJet Fan Equipment32 unitsCaliber: Φ1250mm
Measuring EquipmentComplete set

3. Future developments

The size of the domestic tunnel ventilation market is said to be about 3 billion yen per year, and the demand for replacement and maintenance of aging equipment is growing. EBARA, which has a history of more than 90 years in blower technology and a long track record of delivering blowers in Japan, will continue to contribute to the development of a safe and secure social infrastructure through the provision of a variety of products and services with the aim of achieving greater heights.


The EBARA Group will continue to contribute to the resolution of social issues, including the SDGs, through its business activities and simultaneously improve social and environmental value as well as economic value.

Creating Safe, Resilient and Sustainable Cities