The weather in Hong Kong has changed abruptly recently, with heavy rain in many districts for several days. The Observatory once issued a yellow rainstorm warning. A canal cover at the underground parking lot of APM shopping mall in Kwun Tong. The security of the mall must be enclosed with ice cream cones to prevent vehicles and pedestrians from approaching. Some netizens said with a smile that "the door is open in July (Ghost Festival)". And the three major factors of heavy rain, a large amount of water poured into the water pipe in a short period of time, it will compress the air in the water pipe, like an "air cannon", enough to lift up the pig iron canal cover weighing at least 90 kg.
The canal cover involved is made of pig iron and the weight can reach 90 to 130 kilograms
The canal cover involved is located at the underground parking lot of Kwun Tong APM Shopping Centre near the exit of Kwun Tong Road. On weekdays, an ice cream cone is used to delineate a pedestrian passage for passers-by to walk through. Li Zhiming, a structural engineer familiar with water works, estimates that it will involve an ice cream cone. The canal cover is cast iron, with an inner diameter of 550 mm and a height of 150 mm. It mainly collects clean water and rainwater, and its weight can reach 90 to 130 kg.
A member of the public uploaded a video on August 3. In the video, it can be seen that the drain cover in question kept bouncing and rising under the rainstorm, as if dancing a happy dance. According to the record of the Observatory on that day, a yellow rainstorm warning signal was issued from 3:00 p.m. , which lasted about 1.5 hours.
Expert: A large amount of water pours into the compressed air to become an "air cannon"
After watching the video, many netizens left comments. Some people linked Qu Gai's anomaly with the July Ghost Festival, laughing and saying "the door opened in July", "Is there a bunch of zombies coming in?", "Seven There are friends who want to go there in the month." Some netizens laughed and said that the canal is a happy canal, "jump together if you know how to dance", "there's a rhythm, bad ghost."
Structural engineer Li Zhiming said that if the underground water pipe is close to the sea, in case of tidal force and heavy rain, a large amount of water will pour into the water pipe in a short period of time, which will compress the air in the water pipe and push the pig iron canal up through strong air pressure like an air cannon. cover to let out part of the air to decompress.
The Drainage Services Department confirmed that the canal was not managed by the department, and Hong Kong 01 is making enquiries to Sun Hung Kai Properties, which manages the mall.
Two adults used a dating app in a fraud case. Some private photos were leaked. The agency provided the images to be taken off the shelves. In some cases, you can put water for 2 minutes first
01 Community
