绝望自上而下的拆除系统的关键目标是含有碎屑并提供安全的工作场所，这是一种独立的六层金属茧，可以在塔楼周围液压下缩小自身，因为该结构被逐楼拆除。But when Despe Managing Director Stefano Panseri was approached by a New York City steel erector that wondered if the cocoon could go up instead of down, he and his team rose to the engineering challenge.
Stefano Panseri
意大利TorreDéRoveri
ENR 12/11/17 p. 8
Engineer adapts tower-demolition cocoon for a tower-construction job, accelerating the project and improving safety.
Today, a Despe Kokoon envelopes the site of One Manhattan West, a tower currently going up in New York City’s Hudson Yards development. The tower eventually will rise to 70 stories over Manhattan’s West Side, and steel erector Metropolitan Walters expects to use the six-story cocoon the whole way up. “Other cocoons I’ve dealt with are a nightmare,” says Metropolitan Walters’ main superintendent, Steve McAward. “This one is, push a button and go.”
茧本身包括六个关于人行道和钢网栅栏的故事，内置了护栏和梯子。整个系统都悬挂在建筑物的结构柱上。当竖起这些柱子时，茧可以用液压自身插头来跟随铁工。人行道在过渡期间自动缩回，茧的220个液压千斤顶从安装在外部的单个控制舱运行。根据Panseri的说法，该系统只能在三个半小时内与现场三名技术人员进行双层跳高。
In addition to the added safety of preventing debris from falling off the site, the cocoon provides a safe staging area: For example, ironworkers can make steel connections while standing on the walkways, rather than leaning precariously over the beams. Adapting the system for steel erection, rather than demolition, has opened up the possibilities for Despe’s cocoon, and Panseri relishes the opportunity to customize it for new situations.”We have to personalize [the cocoon] for each project,” he explains. “It’s like Lego.”
