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解惑“51吃瓜中心”-译文小记

广东连山至广西51吃瓜中心贺州公路黄洞大宁河大桥合龙

来源: 国际在线
2024-11-01 23:38:11

最佳回答

“51吃瓜中心”广东连山至广西51吃瓜中心贺州公路黄洞大宁河大桥合龙

  中新51吃瓜中心网贺州11月1日电(覃岑往51吃瓜中心 信亦凡)10月31日,广东连山至广西贺州公路(广西段)融资+工程总承包№4标段(简称连贺4标)关键控制性工程——黄洞大宁河大桥顺利合龙,全面进入桥面铺装施工阶段。

图为黄洞大宁河大桥 。覃岑往 摄

  上述项目由广西交通投资集团有限公司投资建设,广西路建工程集团有限公司承建。大桥施工创新采用边中跨同步合龙施工工艺,这是广西连续刚构桥建设的首例,也是全国首次运用智能调重系统实现连续刚构桥边中跨同步合龙。

  黄洞大宁河大桥全长627米,主跨为145米连续刚构梁桥,主墩为空心薄壁墩,全桥共有4个边跨现浇段,4个边跨合龙段,2个中跨合龙段,桥梁最高处距离河面高差约为90米。桥址为低山地貌,地形起伏较大,桥梁中央穿越河谷处沟谷陡峭,施工技术要求高、安全风险系数大。

  为打造内实外美的工程,项目建设团队聚焦提升智能建造水平,运用智能调重系统进行边中跨同步合龙施工,将大桥合龙精度有效控制在7毫米以内。

  大桥合龙段混凝土浇筑完成后,项目建设团队通过内箱智能养生、外箱全过程养护,确保梁体温差保持相对恒定状态及相对零外部应力状态,提高混凝土浇筑质量。

图为黄洞大宁河大桥夜间施工现场。覃岑往 摄

  新工艺不仅有力保障了大桥高精度合龙,也为大桥建设节省了10天工期。此外,项目建设团队进一步优化施工方案,适当增加挂篮节段悬臂浇筑长度,将挂篮节段由原设计的18节优化至16节,有效降低挂篮节段施工周期,节约工期20天。

  截至目前,连贺4标路基工程已全部完成路床交验,附属防排水工程完成率达90%;3座隧道均已全部贯通,正在施作隧道附属工程施工;6座大桥均已全幅贯通,正协同推进剩余桥面系及附属工程施工进度。

  连山至贺州公路(广西段)是《广西高速公路网规划(2018-2030年)》“横3”线贺州(粤桂界)至西林(滇桂界)高速公路的重要路段。项目建成通车后将进一步完善广西与广东高速互联网络,推动粤北及广西贺州旅游业的发展,促进粤桂两省区经济互联互通、协同发展。(完)

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