南珠高铁玉岑段无砟轨道施工全面启动|艳妇臀荡乳欲伦交换在线播放

  中新网玉林7月20日电(陆新健 吴炜 张召召)南宁至珠海高铁玉林至岑溪段(简称:南珠高铁玉岑段)北流河特大桥无砟轨道底座板19日浇筑完成,标志着南珠高铁玉岑段全面进入无砟轨道施工阶段,为后续按期实现铺轨施工奠定基础。

图为南珠高铁玉岑段北流河特大桥无砟轨道底座板浇筑现场。张召召 摄

  南珠高铁玉岑段正线轨道工程铺轨长度167.958公里,均铺设CRTS双块式无砟轨道。CRTS双块式无砟轨道施工是以混凝土整体浇筑替代传统碎石道床的轨道建造技术,通过轨排组装、精调测量等工序实现道床一次成型。

  作为高铁铺轨前的最后一道重要工序,无砟轨道施工精度要求高、工艺复杂,也是保障时速350公里高速运行的关键,直接影响列车运行平稳性和乘客舒适度。

  为确保精调后轨道高程、轨向和轨距满足设计规范要求,各参建单位多次召开技术专题会和现场办公会,逐一落实无砟轨道工程施工技术保障、物资及现场准备等关键工作。

  据介绍,当前正值广西气温高、雨水多的时节,混凝土凝结过程中容易产生裂纹,为攻克这一难题,工程项目部开展专项设计和培训,并选择当地气温最低的时段进行浇筑作业。同时,通过基面处理、精密测量和轨排框架定位等10多道精密工序的实施,确保工程一次成优,为后续长轨铺设创造了毫米级精度的轨下基础。

图为项目建设现场。张召召 摄

  目前,南珠高铁玉岑段施工已进入全面攻坚阶段,全线路基土石方工程完成99.7%、桥梁工程完成90%,隧道工程完成99.7%。

  南珠高铁玉岑段是南珠高铁南玉段的延伸,项目建成后,将进一步改善桂东地区交通条件,促进广西全面深入对接粤港澳大湾区,带动沿线经济发展。(完)

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发布于:北京市