Due to the problem of the collapse of the road and the underground cavity found in Chofu City, Tokyo, the dismantling work of the house directly above the tunnel will start on the 25th to repair the ground loosened due to the influence of the underground tunnel construction.
In the residential area of Chofu City, road depressions and underground cavities have been found one after another since October, and the East Nippon Expressway, which was excavating the "Tokyo Outer Ring Road" that was being carried out deep underground, is a tunnel. The policy is to repair loose ground in a range of about 16 meters wide, 220 meters long, and up to 50 meters deep just above.
The East Nippon Expressway and other areas are undergoing temporary relocation and purchase of housing within the target area, and demolition work is scheduled to begin on the 25th.
After the house is demolished, the plan is to use a special machine to inject a material that hardens the soil into the ground to increase the strength of the ground, but at this point it is not clear when the work will start.
On the other hand, for the East Nippon Expressway, etc., the underground construction of the "Gaikan Expressway", which had been suspended for more than a year, is scheduled to be resumed from a place other than the collapse site, and the construction will be resumed in Nerima Ward from the 25th. ..