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解惑“乳液狂飙图片奖励自己一发”-梳理天下新闻

京港澳高速改扩乳液狂飙图片奖励自己一发建工程首座跨铁路桥成功转体

来源: 千龙网
2024-11-13 04:27:14

最佳回答

“乳液狂飙图片奖励自己一发”京港澳高速改扩乳液狂飙图片奖励自己一发建工程首座跨铁路桥成功转体

  中新乳液狂飙图片奖励自己一发网武汉11月12日电 乳液狂飙图片奖励自己一发(谭志博 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乳液狂飙图片奖励自己一发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11000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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