Thinking about Japan makes us visualize images of robots and sky-hugging towers that are being built in the country that marks the rise of technology. However, what goes up will have to come down and the same is the case with skyscrapers that have to be demolished after 30 to 40 years. While demolitions in different parts of the world are done differently, a Tokyo-based builder, Taisei Corp, has come up with an all new way of building demolition, one that is quiet, less polluting and above all it helps generate energy too.
The building has come up with the Taisei Ecological Reproduction System or Tecorep, a demolition technique, which can be employed for bringing down buildings more than 100 meters in height. Presently being used to gradually lower the Grand Prince Hotel Akasaka, which is 140-meters in height, the Tecorep is far more elegant when compared with other demolition techniques commonly being employed.
For bringing down the building, the first step is to remove everything inside that is non-structural. Floors are being worked on from the top down and everything is enclosed to limit the debris and then the structure is taken down sequentially. The building’s roof is used to create a closed working site and the cranes work from inside the building, rather than outside. The roof is held by temporary columns, lowered by jack when the higher floors come down.
Japan Times reports that since everything is done in an enclosed space, outside noise is reduced by up to 23 decibels and dust is cut by up to 90 percent. The flagship feature of the technique is that it is more environmentally friendly as the cranes work on a system similar to regenerative braking system employed in hybrid cars. As they lower the debris inside the building they generate clean energy, which is then used to power lights and other equipment.