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The site where Highway = 18 collapsed, Chofu City, Tokyo (provided by citizens)
After noon on the 18th, in a residential area at Higashi Tsutsujigaoka 2 in Chofu City, Tokyo, a passerby said: “The road collapsed and there is a hole.” When a staff member from the Police Agency Chofu Police Station rushed to the scene, there was a hole in the city road that was 5 meters wide, 3 meters long and 5 meters deep. According to nearby residents, the depression started around 8 a.m. and turned into a big hole after 1 p.m. No one was injured. (Katsunori Hanai)
The site is located on the construction route between Nerima and Setagaya on the Tokyo Outer Ring Road (Tokyo Outer Ring Road) connecting the Kanetsu Expressway and the Tomei Expressway. Construction of the tunnel is underway some 40 meters underground, and a 16 meter diameter excavator (shield machine) had just passed by in mid-September.
On the 18th, the East Japan Expressway (NEXCO East Japan), which is proceeding with the construction of the tunnel, announced on its home page that it will suspend construction of the tunnel and hold a meeting of experts to investigate the cause of the collapse, although the causal relationship with the collapse is unknown. did.
According to the city of Chofu, which manages the road, many complaints were received from the city and the construction companies, such as “a part of the outer wall of the house came off” due to vibrations caused by the construction of the tunnel.
A 53-year-old woman from a house about 30 meters from the depressed road complained: “In September, when the shield machine passed by, the block wall of the house was cracked and cracked from vibration.” Another woman who lives nearby said: “The vibration and noise from the construction of the underground tunnel were loud. The impact is widespread on the route and I would like you to investigate it further at this time.”
