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北京新机场航站楼钢结构封顶 凤凰展翅姿态初现

2017-06-30 14:14:23   北京晚报

原标题:就在刚刚,新机场航站楼钢结构成功封顶,世界最大钢铁凤凰已展翅凌空!

今天上午,随着最后一榀钢网架吊装拼接完成,北京新机场航站楼钢结构顺利实现封顶。

从高空俯瞰,钢网架已搭建完毕的北京新机场航站楼,凤凰展翅飞翔姿态已跃然呈现。

5.2万吨网架组成钢铁“凤凰”

“世界规模最大、技术难度最高的单体机场航站楼。”提起北京新机场航站楼,规模是它留给人们的第一印象。航站楼的规模究竟有多大?

走进新机场航站楼,8根如巨人般的C型柱呈点状包围在核心区的四周,最大的一根C型柱,高有28米,重度超过500吨,相当于100头成年大象的重量。其中,呈直角线分布的两根C型柱之间,间距达到200米,足以装下整个水立方。而这8根C型柱,仅仅是构成核心区屋顶支撑体系的一部分。

上午实现封顶的航站楼钢网架结构包括主航站楼和指廊两部分,由支撑体系和屋盖钢结构组成,形成了一个不规则的自由曲面空间,总投影面积达31.3万平方米,大约相当于44个标准足球场,总重量则达到5.2万多吨。其中,主航站楼屋盖钢结构投影面积达18万平方米,相当于25个标准足球场;指廊钢网架总投影面积约13.3万平米,最大跨度41.6米。

负责核心区屋顶钢结构施工的北京城建集团新机场项目经理李建华:

屋盖钢结构投影面积,简单理解,就是阳光投射下来之后所形成的从屋顶到地面的阴影面积,这是衡量建筑规模大小的一个重要指标,也代表着施工难度的高低。

5.2万吨的总重量,是迄今为止单体机场航站楼中钢屋顶最重的。这真的是一只钢铁凤凰。

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