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解惑“14may17_XXXXXL56endian”-梳理天下新闻

京港澳高速改扩建14may17_XXXXXL56endian工程首座跨铁路桥成功转体

来源: 油圈网
2024-11-14 10:53:46

最佳回答

“14may17_XXXXXL56endian”京港澳高速改扩建14may17_XXXXXL56endian工程首座跨铁路桥成功转体

  中新14may17_XXXXXL56endian网武汉11月12日电 (谭志博14may17_XXXXXL56endian 左旭辉 卢琪)京港澳高速公路改扩建工程首座跨铁路桥12日成功转体,跨越京广铁路。

  该项目位于湖北孝感市孝南区三汊镇,转体桥采用支架现浇转体施工,长90米,宽25.51米,转体重量11000吨,由中国铁路武汉局集团有限公司武汉武铁工程项目管理有限公司(以下简称“武铁项目公司”)代建,中铁十一局集团承建。

图为该座桥梁转体后,跨越京广铁路。 武汉铁路局供图

  据介绍,该大桥采用先浇筑、后转体施工,因梁体在线路曲线上,施工中需要确保施工精度,控制好梁体线性和弧度。项目团队依托BIM技术、三维可视化交底、高精度测量放样等新技术、新工艺,克服了球铰安装精度要求高、现浇梁线形控制难、桥梁转体后对位差等难题。

  武铁项目公司相关负责人介绍,京广铁路线该区段密集时段平均7分钟就有一趟列车驶过,转体施工要在一小时完成桥梁84度转体,施工作业时间短、转体重量大、安全风险高,对转体技术和精度的要求极为严格。

  此次“转体”成功秘诀藏于承台之上。在桥墩上下承台预先设置球铰,通过预埋在上转盘的钢绞线的一个拽拉,就像陀螺一样,两个300吨的千斤顶拉着上转盘,带动这个11014may17_XXXXXL56endian00吨的桥梁转动,达到“四两拨千斤”的效果。

  京港澳高速公路纵贯8省市(特别行政区)和多个国家级城市群,被誉为“黄金大通道”。京港澳高速公路湖北北段改扩建工程全长157.79公里,建成后将进一步缓解京港澳高速公路交通压力,强化武汉市综合交通枢纽功能。(完)

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