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解惑“XXXXXL-18—202.4”-环球时报

成达万高铁渠江特XXXXXL-18—202.4大桥首对斜拉索安装完成

来源: 河南日报
2024-12-16 14:21:47

最佳回答

“XXXXXL-18—202.4”成达万高铁渠江特XXXXXL-18—202.4大桥首对斜拉索安装完成

  中新XXXXXL-18—202.4网渠县12月15日电 (记XXXXXL-18—202.4者 刘忠俊)12月15日,随着最后一根斜拉索完成安装,新建成都至达州至万州高速铁路(以下简称“成达万高铁”)渠江特大桥首对斜拉索顺利安装完成,标志着大桥全面进入斜拉索安装施工阶段。

暖阳下渠江特大桥首对斜拉索安装作业现场。记者 刘忠俊 摄

  渠江特大桥位于四川省达州市渠县,是成达万高铁全线控制性工程之一,大桥横跨渠江,全长1983.81米,主跨278米,为双线高铁预应力混凝土箱梁矮塔斜拉桥。斜拉索作为斜拉桥的“生命线”,是桥梁的重要组成部分,起着连接索塔和主梁的纽带作用。大桥设计20对斜拉索,作为“生命线”将主塔和桥面连接,也是大桥主要的受力结构。当日完成安装的首对斜拉索位于37号墩,也是最靠近主塔的一对。“本次安装完成的37号墩A1号索和B1号索,由55根单根环氧钢绞线组成,单根长度125.4米,重7.8吨。”中铁十五局成达万高铁项目二工区总工程师王荣超称,渠江特大桥主跨桥梁全部为预应力混凝土变高箱梁结构,其耐久性、安全性、可靠性优于钢结构。

成达万高铁渠江特大桥索塔上2名工人正在施工作业。记者 刘忠俊 摄

  记者在现场看到,塔柱两侧延伸出两根白色的管子,为斜拉索保护管,全长60米,直径30厘米。“要保证55根钢绞线穿孔的准确性,不让它们搅在一起,也是施工过程中最难的。”王荣超称,穿钢绞线由专业牵引设备完成,在最高点需安排工人进行解绳、穿孔、绑绳等操作,55根钢绞线穿完后,还要在传感器监测下进行张拉、调整,让斜拉索达到目标拉力。至此,整个安装才算完成。

  渠江特大桥桥址距离国、省道公路较远,施工场地有限,材料运输较难。项目施工团队因地制宜,精心编制主塔施工、斜拉索施工等专项施工方案,严格把控塔端梁端架设、斜拉索张拉等关键工序,最终顺利完成首对斜拉索的安装。“渠江特大桥矮塔斜拉桥首对斜拉索安装完成后,桥梁施工由无索区进入有索区,斜拉桥重大关键技术取得全面突破。”成达万高铁公司达州建设指挥部指挥长张宗伟称。

渠江特大桥上2名工人正在进行斜拉索张拉施工作业。记者 刘忠俊 摄

  成达万高铁是我国“八纵八横”高铁网沿江通道的重要组成部分,正线全长477公里,设计时速350公里。建成后,将形成成都直达中原和京津冀地区的便捷客运通道,极大便利沿线群众出行。(完)

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