Disaster prevention measures for wide areas in urban areas

#SmartCity

#Disaster Prevention and Safety

#energy

#Urban Civil Engineering

#DHC

#BCP

#office

Mitsubishi Jisho Design Smart City TOP

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Research support for strengthening disaster prevention measures in the Otemachi, Marunouchi, and Yurakucho areas

Data

Project name	Strengthening disaster prevention measures in the Otemachi, Marunouchi and Yurakucho areas Research support services
Year of completion	2020
location	Tokyo Chiyoda Ward Marunouchi 3-chome to Yurakucho 1-chome
Application area	Air conditioning and heating, emergency power supply
structure	Shield Tunnel
Inner diameter	3.2m
Extension	254.9m
Maximum Depth	34.6m
remarks	Road occupancy, designated tunnel

In preparing for a large-scale disaster such as a Tokyo metropolitan earthquake, the construction of the new Marunouchi Nijubashi Building not only strengthened the disaster response capabilities of the new building, but also improved the BCP functions of existing buildings and strengthened the area's disaster prevention capabilities. A highly earthquake-resistant tunnel was constructed about 250 meters under the road on Marunouchi Nakadori Street, and a power infrastructure was planned to supply power from the Marunouchi Nijubashi Building to the three existing buildings, ensuring emergency power for about 72 hours.
This facility is positioned as an urban regeneration and safety assurance facility in the Otemachi, Marunouchi, and Yurakucho District Urban Regeneration and Safety Assurance Plan, and its construction has contributed to the local community through urban development.

In recent years, serious natural disasters have occurred frequently, and awareness of disaster resilience is growing in various regions. In particular, if a major earthquake such as a metropolitan earthquake or a Nankai Trough earthquake were to occur, the human and economic damage would be severe.

In densely packed office areas in the city center, the disruption of transportation means has left office workers and visitors unable to return home, and there is a need to develop temporary accommodation facilities to accommodate these people. There is also a need to expand BCP functions to ensure that offices can continue to operate in the event of a disaster.

There is a risk that temporary accommodation facilities and energy infrastructure required to ensure BCP functions may temporarily stop functioning in the event of a disaster, so it is important to ensure this throughout the entire area. In this case, infrastructure was developed to supply heat and electricity, but various other infrastructure supplies, such as information and communications, water, and general water piping, can also be considered.
In addition to these hard energy supply improvements, we believe that in the future, by combining soft technologies such as optimizing the supply and demand balance using a virtual power plant (VPP), disaster prediction using sensing technology, disseminating disaster information using digital signage, and rapid disaster information analysis using AI, we can transform the city into a smart one that is resilient in the event of a disaster.