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Back宜昌城西高速三峡大桥北岸主墩承台顺利浇筑完成
宜昌城西高速三峡大桥北岸主墩承台顺利浇筑完成
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中国新闻网1 hour agoBusiness3 min readChinaView translation

宜昌城西高速三峡大桥北岸主墩承台顺利浇筑完成

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9月9日,由中交二航局承建的宜昌城西高速三峡大桥北岸主墩承台顺利浇筑完成。该大桥是国内跨度最大的双层钢桁-UHPC桥面板组合梁悬索桥,也是长江上最宽钢桁梁悬索桥。

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宜昌城西高速公路起于夷陵区小溪塔街道,止于长阳土家族自治县高家堰镇,三峡大桥是其关键控制性工程。

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中新网宜昌9月9日电(李慧玺 余哲)由湖北交投集团投资建设、中交二航局承建的宜昌城西高速三峡大桥北岸主墩承台9日顺利浇筑完成。

9月9日,宜昌三峡大桥北岸主墩承台顺利浇筑完成。 中交二航局供图

宜昌城西高速公路起于夷陵区小溪塔街道,衔接G42沪蓉高速,止于长阳土家族自治县高家堰镇,对接G50沪渝高速,线路全长46.997公里,全线采用双向六车道标准建设。其中,三峡大桥是全线关键控制性工程,坐落于三峡大坝与葛洲坝之间的西陵峡口,上层为双向8车道高速公路,下层布置慢行观光系统。大桥主跨1200米,宽42.6米,桥面距江面270米,是目前国内跨度最大的双层钢桁-UHPC桥面板组合梁悬索桥,同时也是长江上最宽钢桁梁悬索桥、湖北省首座桥旅融合大桥,入选交通运输部交通强国示范工程。

三峡大桥北岸主墩承台为分离式承台配群桩基础结构,左右幅承台尺寸均为长26.2米、宽26米、高8.5米,设计浇筑方量5790.2立方米。大桥主墩承台地处西陵峡临江峡谷地带,昼夜温差大,大体积混凝土浇筑极易产生温度裂缝,对浇筑工艺、温控养护和施工连续性提出极高要求。同时,混凝土罐车需途经G348三峡旅游公路,车流集中导致通行保障困难;项目紧邻长江生态管控带,水土保持与污水处置环保标准严苛。

面对多重施工难题,项目部组建专项技术攻坚小组,结合现场地质与水文条件优化施工方案,采用分层浇筑、分区振捣工艺,精准控制混凝土配比、浇筑速度与振捣密度。项目引入智能化温控监测系统,实时追踪混凝土内外温度变化,运用制冰技术降低混凝土入模温度,配合分层保温与洒水养护,有效预防裂缝产生。同步坚守长江绿色施工底线,施工现场配套一体化泥浆及污水处置站,施工废渣与废弃建材统一集中转运,裸土全覆盖抑尘,最大限度降低对长江水域及周边山体植被的扰动。

三峡大桥建成后,将补齐宜昌绕城高速闭环通道,将市区高速路网由“C”形闭合为完整“O”形环线,优化长江过江通道布局,完善三峡区域综合交通网络,有力支撑三峡水运新通道国家重大战略落地,对宜昌全域交通提质和文旅融合发展具有深远意义。

Open Questions

  • 三峡大桥预计何时全线合龙?
  • 项目计划于哪一年正式通车?

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This article was originally published by 中国新闻网.

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