Last year, it was discovered that a new cavity was found in a residential area where a road collapse and an underground cavity were found in Chofu City, Tokyo.
This is the third cavity, and the East Nippon Expressway, which is excavating a tunnel underground in the vicinity, will immediately fill the cavity.
A new cavity was found near a park in a residential area of Chofu City, Tokyo.
Since October last year, the East Nippon Expressway, which is conducting tunnel excavation work for the "Tokyo Gaikan Expressway" = "Gaikan Expressway", has been renewed in the immediate vicinity of the place where the collapse of the road and the underground cavity were found. I found it in a boring survey and published it.
According to it, the cavity is about 16 meters underground, measuring about 10 meters long, about 4 meters wide, and about 4 meters high inside.
The East Nippon Expressway is supposed to monitor changes in the ground surface with equipment and immediately fill the cavities.
The East Nippon Expressway acknowledged a causal relationship and apologized to the residents for individual compensation, saying that the collapse of the road and the underground cavity found in October last year are likely to be due to the excavation work of the tunnel. And then.