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钢桁梁斜拉桥世界第一跨

作者:金沙js55555官网科技评价中心 发布时间:2018/5/17 下午5:21:27 查看次数:4871

    2018年4月23日,金沙js55555官网在北京组织召开了中交路桥建设有限公司“山区特大跨度钢桁梁斜拉桥设计施工关键技术研究”项目成果评价会。本项目应用于桥梁建设领域,依托鸭池河特大桥设计及施工建设展开,鸭池河特大桥是贵阳的重要区际高速公路贵黔高速控制性桥梁工程。大桥主桥全长1240m,总体布置为双塔双索面大跨度斜拉桥,主跨径800m,为世界跨度最大的钢桁梁斜拉桥。鸭池河特大桥由中交路桥建设有限公司投资,中交第二公路勘察设计研究院有限公司设计,中交路桥华南工程有限公司承建。
    鸭池河山高谷深,地势险峻,岸坡前缘近于直立。桥址区属于构造侵蚀岩溶中山峡谷地貌区,河谷呈“U”型深切,河岸地势陡峭。山区大跨度桥梁建设的显著特点是施工条件差、场地狭小、大型设备、构件运输困难、工作面严重受限等,其它大跨度斜拉桥的施工方案已不能满足鸭池河特大桥建设的需要。虽然国内外已建设多座大跨径钢桁梁斜拉桥,特别是近年来,钢桁梁斜拉桥在我国得到了更多应用,为钢桁梁斜拉桥施工积累了充实的经验。但国内钢桁梁斜拉桥技术标准和验收标准非常笼统,不能真正有效指导施工,需进一步研究,细化斜拉桥上部构造技术标准和验收标准。
项目组面对前所未有的复杂技术问题,攻坚克难 ,对山区大跨径钢桁梁斜拉桥的施工工艺进行了深入、全面的研究,总结提炼出了一整套大跨斜拉桥施工技术。针对山区深切峡谷的复杂建设条件,提出了小边中跨比、大跨度钢桁-混凝土混合梁斜拉桥结构体系及关键构造,形成了适合山区的大跨径斜拉桥设计施工成套技术;利用索塔支撑,首次研制了800m跨径、350t缆索吊成套装备,形成了一种斜拉桥钢桁梁安装新工法;研制了索塔钢筋节段拼装胎架、劲性骨架、可调节吊具、对接导向装置,实现了索塔钢筋节段整体对接、快速安装。在场地受限的复杂地质地形下,快速高效、安全低成本的完成桥梁建设。本项目具有适用范围广、综合成本低、操作简单、施工速度快、安全环保等优点。
    本项目研究成果为鸭池河特大桥的顺利建成提供了技术保证,并提升鸭池河特大桥的科技含量,形成适合山区的大跨径混合式钢桁梁斜拉桥的成套设计及施工技术,推动钢桁梁斜拉桥在山区的应用,促进山区桥梁与交通事业的发展与科技进步。随着国内高速公路的快速发展,特别是山区大跨径桥梁建设问题突出,可以对国内山区大跨径斜拉桥设计、施工起到重要指导意义,具有广阔的应用前景。

         鸭池河大桥                          科技成果评价会现场

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