杭州湾跨海铁路桥建设提速 助力“轨道上的长三角”|欧美伊人久久大香线蕉综合
中新网杭州10月10日电(奚金燕)10月10日凌晨,在世界三大强潮海湾之一的杭州湾海面上,最后一方混凝土顺利浇筑入模,标志着杭州湾跨海铁路桥南航道桥首个下横梁浇筑圆满完成,南航道桥南主塔由下塔柱施工转入中塔柱施工阶段,为全桥后续建设奠定了基础。

杭州湾跨海铁路桥是新建南通至宁波高速铁路(以下简称通甬高铁)的控制性工程,包括北、中、南三座航道桥和跨大堤、海中、浅滩区引桥,全长29.2公里,采用时速350公里的双线无砟轨道设计,是目前世界上在建长度最长、建设标准最高的高速铁路跨海大桥。
其中南航道桥全长814.5米,主跨为364米,采用钢桁结合梁斜拉桥结构,共设南北两座主塔。位于主塔下塔柱与中塔柱交界处的下横梁,是主塔关键受力构件,其作用如同“挑山工的扁担”,未来将直接承载铁路桥面,并将列车运行的巨大荷载传递至塔身与基础。
杭州湾是典型“喇叭状海湾”,施工环境极为复杂,具有大潮差、强冲刷、急流速、深厚淤泥层及浅层气多发等自然特点,加上海上天气多变,施工难度大、安全风险高。据悉,此次承建方中交二航局项目团队实施连续11小时作业,并在塔身内部布设冷却水管,结合智能温控系统进行实时监测与调控,有效保障了混凝土施工质量与结构耐久性。
通甬高铁是中国“八纵八横”高铁网沿海通道的重要组成部分,自盐通高铁南通西站起,向南经江苏省苏州市,浙江省嘉兴市、宁波市,引入宁波枢纽宁波站,新建线路长301公里,设计时速350公里,全线设10座车站。项目建成后,将与多条高铁线路相连,对于打造“轨道上的长三角”具有重要意义。(完)
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