Early recovery from disasters and quick response in an emergency

Expressway disaster recovery

Cases of restoration activities after the Great East Japan Earthquake

In the Great East Japan Earthquake that occurred on March 11, 2011, many damages such as cracks and steps on the Tohoku Expressway and Joban Expressway, collapse of embankments, damage to the expansion and contraction device of the bridge, etc. Was carried out. We carried out an emergency inspection and temporary restoration, secured an emergency traffic route the next day, and canceled the suspension of almost all lines 13 days later.

Joban Expressway Mito IC-Naka IC Restoration status of embankment collapse point

Immediately after the disaster Pictures taken around 16:00 on March 11, 2011
Immediately after the disaster About 16:00 on March 11, 2011
State after emergency restoration Photo taken around 17:00 on March 17, 2011
State after emergency restoration About 17 o'clock on March 17, 2011
Case example of the Hokkaido Eastern Iburi Earthquake

In the Eastern Hokkaido Iburi Earthquake on September 6, 2018, when the maximum seismic intensity of 7 was observed in Hokkaido, approximately 50% of the Expressway (about 360 km) in Hokkaido managed by NEXCO EAST were closed. After the earthquake occurred, we quickly established a system and carried out inspections and emergency restoration work to secure an emergency vehicle traffic zone within approximately 5 hours after the earthquake.

In addition, Expressway seismic intensity observed by, sometimes seismic intensity 6 lower of Oiwake-cho IC was the maximum, Expressway, but large damage did not occur, for large-scale power outage caused by the earthquake, private power generation The facility was put into operation and all suspensions were lifted 14 hours after the earthquake. In addition, we implemented free measures for Expressway for vehicles engaged in disaster dispatch, including disaster volunteers.

Doo Do Kitahiroshima IC-Sapporo Minami IC Rest area at steps

Immediately after the disaster Pictures taken around 11:00 on September 6, 2018
Immediately after the disaster Around 11:00 on September 6, 2018
State after emergency restoration Photo taken around 13:00 on September 6, 2018
State after emergency restoration Around 13:00 on September 6, 2018

Doo Do Kitahiroshima IC-Sapporo Minami IC Rest area at steps

Photograph of a letter of appreciation from the Governor of Hokkaido
Certificate of appreciation from the Governor of Hokkaido

Disaster prevention and mitigation measures

Making disaster-resistant roads

As a road that is resistant to disasters, in order to quickly recover its function after a large-scale earthquake, the installation of step-prevention structures, bridge-prevention structures, lateral displacement restraint structures, bridge pier reinforcement such as pier reinforcement and reinforcement of bearings, etc. We also promote measures to eliminate accumulated water in the embankment to prevent the slope of the embankment from collapsing.

The Kumamoto earthquake that occurred in April 2016, straddle has a locking piers ※ in Kyushu road Expressway response to the fact that the bridge (over the bridge) was girder, NEXCO EAST addition to the bridge with the same structure that is managed by local governments, such as We are promoting seismic reinforcement of the bridges we manage.

  • Rocking pier: It is often used in Expressway bridges over which visibility and landscape are required, but seismic retrofitting is necessary because it is unstable when the superstructure of the bridge becomes unstable due to large movement or rotation. .
Photo before reinforcement
Before reinforcement
Photo after reinforcement
After reinforcement
Making SA a disaster prevention base

Following the Great East Japan Earthquake, SA on Expressway was used as a gathering base and relay base for the Self-Defense Forces, fire departments, etc. We have established an SA that has a function that can be used as a backup for lifelines such as, and can be used as a common disaster countermeasures room, and conduct disaster prevention drills jointly with related organizations.

Picture 1 of the joint disaster drill (Joban Road Moriya SA (up line))
Photograph 2 of the joint disaster drill (Joban Road Moriya SA (up line))

Joint disaster prevention drill (Joban Expressway Moriya SA (In-bound line))

Lifesaving support

11 lifesaving support heliports for helicopters to take off and land at 29 locations such as SA / PA in NEXCO EAST in order to promptly transport people injured in the event of a disaster and implement prompt disaster countermeasures. Has an "access road for exclusive use of emergency vehicles". We also use these facilities and conduct training jointly with related organizations.

Photo of arrival and departure (training) of doctor helicopter
Arrival and departure of doctor helicopter (training)
Photo of a vehicle (training) passing through an emergency approach road
Vehicles passing through an emergency approach (training)