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Reporter: Tokyo’s Grand Prince Hotel Akisaka is a shadow of its former self, and it’s shrinking by the day. Floor by floor the building is being 1)demolished from the inside, a clean and efficient technique being used for the first time. It was developed by the Taisei Corporation’s Hideki Ichihara.
Ichihara: (via translator) The cap, which sits on top of the building, will be 2)jacked down in stages. So the building you see behind me has been reduced from an original height of 140 meters and is now around 80 meters.
Reporter: And in six months it will have disappeared from the skyline completely.
From the outside the demolition is barely noticeable, but inside it’s a 3)hive of activity.
Heavy machinery on the top floor destroys beams, columns and most of the floor itself before temporary jacks underneath bring the debris down one level. An interior 4)crane then lowers the debris to the ground, a process that generates electricity for other equipment at the same time.
In a densely-built city like Tokyo, it’s a practical alternative to methods used elsewhere in the world.
Ichihara: (via translator) You can only use explosives to collapse a building under the condition that there are no other buildings around. But if you collapse this building using explosives, that building and the one over there will be affected. So, in conclusion, we obviously can’t use explosives in Japan.
Reporter: But it’s a method Ichihara says has application in other countries. Not only is it much cleaner than conventional demolition, it’s also much quieter, something Ichihara says, “is worth shouting about.”
记者:东京赤坂区王子酒店正悄无声息地缩水,只有昔日大厦的影子般高了。这座大楼正从内部被逐层拆除,这种干净又有效的拆除技术是首次运用于实践。该项技术是由大成建设集团的秀树一原发明的。
一原:(通过翻译)建筑的内部会用千斤顶撑起整个楼顶,它会随着楼层的拆除往下降。因此你看到在我身后的这幢建筑原来是140米高,如今被拆到只有80米左右了。
记者:六个月之后这座建筑就会完全从天际中消失。
从外观上,几乎看不出这座建筑正在被拆除,但在内部拆除工作正进行得热火朝天。重型器械在顶层拆除横梁,柱子,包括大部分的楼面,之后下一层的临时千斤顶就会把碎石运下来。而大楼内部的起重机会把碎石运到地面,这个过程同时能为其他设备发电。
在世界各地的像东京这样建筑物密度高的城市,这种拆楼方法是实际有效的选择。
一原:(通过翻译)只有在周围没有其他建筑物的情况下,你才能用炸药来拆除一座建筑物。但是如果你用炸药来炸掉这幢大楼,旁边那座建筑,那边那座建筑都会受到影响。因此,总而言之,我们显然不能在日本用爆破拆除方式。
记者:但是一原说这个方法在其他国家也适用。它不仅仅比传统拆除方式干净得多,而且噪音小得多。用一原的话说,这是一个“值得宣扬的方式”。