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“jul-146绝不能对老公”-环球时报

广清城际铁jul-146绝不能对老公路流溪河特大桥顺利合龙

来源: 北京晨报
2024-11-19 00:30:24

最佳回答

“jul-146绝不能对老公”广清城际铁jul-146绝不能对老公路流溪河特大桥顺利合龙

  中新jul-146绝不能对老公网广州11月18日电 (jul-146绝不能对老公郭军 吕翀 周建华)11月17日,在新建广清城际铁路流溪河特大桥施工现场,随着挂篮改装桥面提jul-146绝不能对老公升架缓缓提升,一座重540吨钢混连续梁跨中大节段,在河面上方50米处与两端严丝合缝对接完好。这标志着该座特大桥顺利合龙,为广清城际铁路按期高质量开通运营按下“加速键”。

  广清城际铁路南延线由广铁集团广州工程建设指挥部建设,由中铁三局负责施工。流溪河特大桥是项目重点控制性工程,主跨为(70+160+70)米跨双线有砟混合连续梁,采用悬灌加整体吊装施工。跨中部分为钢箱梁结构,全长63米,两侧设6.5米钢混连接段,中间50米跨中大节段采用整体吊装法施工。

广清城际铁路流溪河特大桥17日顺利合龙。广铁集团 供图

  桥梁跨中大节段分三段制作,相继拼装焊接而成。在制作过程中,建设团队不断优化制造工艺,积极运用钢箱梁板单元的几何尺寸精度控制、坡口焊缝熔深控制、总拼装线形及接口匹配连接精度控制等新技术、新工艺,确保钢箱梁制造质量,整体钢箱梁由工厂水运到现场进行吊装,合龙间隙为2厘米。

  “把这么一个庞然大物顺利吊装难度很大,为此我们组织参建单位多次研究施工方案,选用挂篮改装桥面提升架技术进行吊装施工。”广铁集团广州工程建设指挥部广湛段落副指挥长符自创介绍,前期对传统挂篮进行了优化,既加强了挂篮的刚度和稳定性,又提高了钢箱梁吊装施工效率,有效节约了建设成本。

  参建团队为保证吊装作业全过程安全可控,在流溪河设置4个锚定位,运输船采用“八字抛锚法”保证船体的稳定性。并积极协调广州市海事部门对施工水域进行临时封航,为水上作业保驾护航。施工过程中,通过计算机控制液压系统实现各吊点同步提升,通过先进的电液比例控制技术,将各吊点之间的同步精度控制在1毫米内,为合龙段施工的顺利实施提供有力有效保障。

  广清城际铁路连接广州市和清远市,是珠三角城际铁路的重要组成部分。该项目的顺利推进,将进一步增强广州对周边区域的辐射带动能力,推动粤港澳大湾区轨道交通一体化发展。(完)

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