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“啊⋯啊⋯啊⋯快⋯高潮了69”-知识课堂

杭州湾跨海啊⋯啊⋯啊⋯快⋯高潮了69铁路桥南航道桥首个钢吊箱顺利下放

来源: 北京日报
2024-10-30 11:32:13

最佳回答

“啊⋯啊⋯啊⋯快⋯高潮了69”杭州湾跨海啊⋯啊⋯啊⋯快⋯高潮了69铁路桥南航道桥首个钢吊箱顺利下放

  中新啊⋯啊⋯啊⋯快⋯高潮了69网杭州10月28日电(王逸啊⋯啊⋯啊⋯快⋯高潮了69飞 许文峰)据中国铁路上海局集团有限公司28日消息,当日10时50分,在世界三大强潮海湾之一的杭州湾海平面上,“二航卓越”号起重船将2500吨重钢吊箱沉放到160号主墩设计位置,标志着杭州湾跨海铁路桥南航道桥首个钢吊箱顺利下放,大桥即将进入主墩承台施工阶段。

杭州湾跨海铁路桥南航道桥首个钢吊箱下放作业现场。中国铁路上海局集团有限公司 供图

  杭州湾跨海铁路桥是新建南通至宁波高铁的关键控制性工程,包括北、中、南三座航道桥和跨大堤、海中、浅滩区引桥,全长29.2公里,采用时速350公里的双线无砟轨道设计。其中南航道桥由中交二航局承建,大桥全长814.5米,主跨为364米,采用钢桁结合梁斜拉桥结构,共设计6个桥墩、148根钻孔桩,其中159号、160号为主墩。

杭州湾跨海铁路桥南航道桥首个钢吊箱下放作业现场。中国铁路上海局集团有限公司 供图

  此次下放的钢吊箱位于160号主墩,长55.7米,宽40.2米,高25.1米,厚度1.8米,平面尺寸呈圆端形,重约2500吨,占地面积相当于5个标准篮球场,钢吊箱内外水头差达25米,为国内最大高度。整个钢吊箱相当于在海中放置一个巨型“箱子”,将箱子底部和海中桩基相连并固定,然后向底部浇筑混凝土,抽干里面的海水,就可以形成一个小型“人工岛”,使海洋施工环境变为陆地环境,方便承台施工。

  担任此次钢吊箱下放任务的起重船“二航卓越”是目前国内最大双臂架变幅式起重船,总长165米,宽52米,深11米,设计吃水6.5米,最大起重量5500吨,最大起升高度120米,采用双臂架型式,适用于大跨桥梁箱梁等长大构件整体吊装。

杭州湾跨海铁路桥南航道桥首个钢吊箱下放作业现场。中国铁路上海局集团有限公司 供图

  新建南通至宁波高铁是中国“八纵八横”高铁网沿海通道的重要组成部分,项目建成后,将与盐城至南通高铁、京沪高铁、沪昆高铁、宁波至台州至温州高铁、沪宁沿江高铁等多条线路相连,对于打造“轨道上的长三角”,完善区域路网结构布局,方便沿线民众出行,推进长三角一体化高质量发展等具有重要意义。(完)

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