Abstract
Massive earthquake named “Tonankai Massive earthquake” is predicted to occur in the near future and is feared to cause severe damage in Kinki District . “Hanshin-Awaji Massive Earthquake” in 1995 destroyed most of the buildings constructed before 1981 and not complying with the latest earthquake resistance standards. Collapsed buildings blocked roads, obstructed evacuation, rescue and firefighting operations and inflicted further damages.To alleviate the damages, it is important to predict the points where collapsed buildings are likely block the roads and to take precautions in advance. But big cities have an expanse of urban areas with densely-distributed buildings, and it requires time and cost to check each and every building whether or not it will block the road. <br><br> In order to reduce blocked roads when a disaster strikes, we made a study and confirmed that the risk of road blocking can be determined easily by means of the latest technologies of survey and geographical information.
Highlights
During the years of steep economic growth in Japan, infrastructure was upgraded to improve standard of living of the nation and wealthy lives of the people were realized
Big cities have an expanse of urban areas with densely-distributed buildings, and it requires time and cost to check each and every building whether or not it will block the road
Based on the above criteria, we studied to determine the risk of blocking roads other than Emergency Transport Route in dense urban areas
Summary
During the years of steep economic growth in Japan, infrastructure was upgraded to improve standard of living of the nation and wealthy lives of the people were realized. In big cities densely-built wooden house areas were formed where the houses built at the time do not comply with the latest earthquake resistance standards. It is feared that collapsed building will obstruct the vehicles for emergency operations when a disaster occurs. On the other hand as shown, in case of the Hanshin Massive Earthquake occurred directly under the urban area in 1995, serious damages were caused not by tsunami but by the roads blocked by collapsed buildings in dense residential areas, rendering them impassable for emergency vehicles for rescue and fire fighting and further damage was inflicted. Nankai Trough Massive Earthquake predicted to occur within 30 years with probability of 70% is feared to destroy 940 thousand to 2.4 million buildings and create serious obstacles on road networks. The main road is not blocked Figure. Roads blocked by Hanshin-Awaji Massive Earthquake
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