现场“拼积木” 新渝万高铁新桥双线特大桥今合龙|欧美又大又硬又粗BBBBB
8月13日,新建重庆至万州高速铁路新桥双线特大桥64米节段拼装梁最后一块节段精准拼接合龙,标志全桥22孔64米预制节段拼装梁全部完成,该桥顺利合龙为全线按期通车奠定了坚实的基础。
新桥双线特大桥位于涪陵区江北街道花朝门,全长1848米,由中铁二院设计、中国铁建大桥局承建。该桥穿越沟谷地带,最大墩高达100米,共设22孔64米节段拼装简支梁,每孔梁由17个节段胶接拼装而成。
据介绍,该结构形式将64米简支梁分解为17段长度约4米的节段,长短线结合法工厂化预制,采用专用架桥机现场拼接成型,对比传统的悬臂浇筑、支架现浇等方法,工艺更简单、也更加安全可靠。64米预制节段拼装梁,对比32米简支梁跨度增加一倍,对于沟谷地带高墩桥梁降低施工难度、保证工程质量、降低工程造价、加快施工进度具有重要意义,是一种新颖的结构形式,具有积极借鉴推广价值。
渝万高铁是我国“八纵八横”高铁网包(银)海、京昆通道的组成部分。线路起自重庆东站,途经重庆市南岸区、巴南区、涪陵区、丰都县、忠县至万州区,接入万州北站。正线全长251公里,设计时速350公里。项目建成通车后,将促进渝东北三峡库区城镇群和主城都市区便捷联系,极大便利沿线人民群众出行,促进沿线经济社会发展,对更好服务成渝地区双城经济圈建设重大战略实施,助推“一带一路”与长江经济带的联动发展,具有十分重要的意义。
(总台记者 李洪淼 张波俊)
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