How to demolish a 100-meter tall building? China bombed, but in Japan it was quietly "eaten" layer by layer.

a 100-meter tall building? China often uses directional blasting to directly and brutally destroy buildings with a bang.

But in Japan, in order to reduce noise and dust pollution, engineers have invented and designed a high-rise demolition scheme, which is very novel by decomposing the building layer by layer until it disappears.

If you walk through here every day, you won't even notice any change in the place. It's not until more and more floors are demolished that you may suddenly realize.

The following footage shows the demolition of the Prince Hotel in Akasaka, Tokyo. We used a time-lapse method to give you a clearer view of the whole demolition process.

At the Akasaka Prince Hotel, they built a three-story scaffolding floor on top of the building to be demolished.

Moreover, the exterior of the scaffolding layer is covered with panels similar to the design style of the building, which makes it impossible to see that it is a structure added later.

In this scaffolding floor, they gradually removed the floor covered by the scaffolding floor with heavy equipment such as hydraulic shears at the speed of removing two floors in 10 days.

Demolition looks like this from the inside-

in addition to this top-down demolition method, there is also a shocking bottom-up demolition method.

For example, during the demolition of the 90-meter-high building, workers from Kashima Construction Company cut the 40 pillars supporting the bottom of the building by 0.7 meters and supported the building with hydraulic jacks.

These "civilized" demolition methods can not only be safer and more beautiful, but also reduce noise and dust. Hideki Ichihara, a spokesman for Taisei Construction, said the method produces 20 decibels less noise and 90% less dust than traditional methods.

In addition, this fine operation also facilitates the recycling of building materials and reduces the energy consumption of demolition operations.

It is hoped that our country's construction enterprises can learn from it and truly build our country into an energy-saving and environmental protection society.