成都至眉山市域铁路岷江特大桥主跨顺利合龙|色综合久久久久综合体桃花网
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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。
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。
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。
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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