成都至眉山市域铁路岷江特大桥主跨顺利合龙|成人区精品一区二区婷婷

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  中新网眉山7月27日电 (记者 刘忠俊)7月26日,市域(郊)铁路成都至眉山线(以下简称“成眉S5线”)控制性工程——岷江特大桥主跨完成混凝土浇筑,实现精准合龙。

正在加紧建设的成眉S5线岷江特大桥。记者刘忠俊摄

  据了解,作为连接成都与眉山的重要轨道交通工程,成眉S5线全长59.14公里,设13座车站,采用最高时速160公里的市域A型车。此次合龙的岷江特大桥全长768米,跨岷江的主跨达198米,施工难度大。

合龙后的成眉S5线岷江特大桥主跨。成都轨道集团供图

  此次合龙施工采用“人机协同”精准控制体系,施工团队提前48小时启动顶推作业,用两台500吨级千斤顶将两侧桥面分别顶开23.1毫米和25.4毫米,预留混凝土收缩空间。合龙施工时,31立方米混凝土历经4小时连续浇筑,通过泵车垂直40米、水平90多米的精准输送,最终完成合龙。过程中,650个传感器组成的智能监测系统与人工测量组实时联动,实现毫米级精度控制。

  “成眉S5线岷江特大桥主跨合龙后,施工将转向剩余边跨工程,预计8月中旬实现全桥贯通。”成眉轨道公司工作人员黄铁称。

远眺建设中的成眉S5线岷江特大桥,远处是眉山城区一角。记者刘忠俊摄

  目前,成眉S5线已有9座车站封顶,9台盾构机已累计掘进16700余米。项目建成后,四川天府新区至眉山城区通勤时间将缩短至约30分钟,为成都、德阳、眉山和资阳同城化提供关键交通支撑。(完)

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