Why did the lid of the 2-ton storage tank come off? Heavy rain Gifu July 9 22:51
On the 8th, in Gifu City, a 2 ton lid of a storage tank buried in a road suddenly came off and a car crashed into a running vehicle, resulting in one person being injured. Assuming that the air in the storage tank was compressed and pushed up the lid all at once, we will investigate the detailed cause and consider recurrence prevention measures. The number of people injured in Gifu prefecture due to the heavy rain is now one.
Around 6:40 am on the 8th, on a city road in Matsugae-cho, Gifu City, a lid of about 2 tons in weight of a storage tank buried in the road to temporarily store rainwater hit a running car, A teenage woman out of the three in the car was injured lightly.
According to the city, this storage tank was constructed in 2014 to prevent inundation damage at a depth of 7 meters underground, and can store 6200 cubic meters of rainwater, which is equivalent to about 20 pools of 25 meters. is.
According to the city's previous research, a large amount of rainwater flowed into the storage tank in a short time, the air in the storage tank was compressed, the atmospheric pressure inside the storage tank became extremely high, and about 2 tons of the lid was blown at once. It seems to have pushed up.
At the time of the accident, Gifu city was experiencing heavy rain of 36 mm per hour, and the city further investigated the amount and speed of rainwater that flowed into the storage tank, as well as whether there was a structural problem or measures to prevent recurrence. I will consider about.
This accident left one person injured in Gifu prefecture due to the heavy rain.