全国首座高铁大跨度网状吊杆系杆拱桥施工完成|日本电影大尺度

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  中新网成都7月11日电 (记者 刘忠俊)7月11日,随着西安至重庆高速铁路安康至重庆段(以下简称“西渝高铁康渝段”)跨营达高速公路大桥主体平稳落在桥墩上,标志全国首座高铁大跨度网状吊杆系杆拱桥施工完成,为全线按期建成奠定了坚实基础。

西渝高铁康渝段跨营达高速公路大桥施工现场。京昆高铁西昆公司供图

  跨营达高速公路大桥位于四川省达州市,全长443.1米。“由于桥梁需上跨营达高速公路,为减少对公路运营影响,系杆拱桥采用在高速公路一侧进行钢结构整体拼装,通过顶推施工法,完成跨越。”中铁二院西昆指挥部西渝项目部桥梁专业负责人曾焰称,该桥是我国高速铁路大跨度桥梁首次采用两个及以上吊杆交叉形成网状布置,使受力更加合理、荷载得到更好分布的同时,有效减少拱肋和系梁弯矩。

  据了解,此次实施顶推的钢箱系杆拱桥重2600吨,长147米,宽17米,顶推位移约146米,顶推耗时达10天。为保证施工安全和质量,中铁四局建设者自主研发智能顶推控制系统,采用无人机航拍图像匹配算法和位移追踪技术,动态采集系杆拱桥主体结构、临时导梁以及主体结构连接部位应力等关键数据,并通过数值模型进行深度分析,运用人工智能算法提前预判趋势,实现全过程实时风险预警,确保顶推作业安全。“施工期间,克服顶推施工支架跨度大、系杆拱桥与高速公路斜交角度小、顶推支墩布置不对称、顶推施工过程监控监测要求高等难点,确保顶推作业安全有序进行。”中铁四局西渝高铁项目部经理闫明赛称。

俯瞰跨营达高速公路的高铁大跨度网状吊杆系杆拱桥。京昆高铁西昆公司供图

  西渝高铁是我国“八纵八横”高铁网北京至昆明的京昆通道和包头、银川至海口的包(银)海通道的重要组成部分,路网地位十分重要。西渝高铁康渝段正线全长478公里,自安康西站起,经陕西省安康市,重庆市城口县,四川省达州市、广安市,重庆市合川区、北碚区,引入重庆枢纽重庆西站。(完)

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