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解惑“JJZZ JJZZ”-环球时报

长8735米的JJZZ JJZZ成达万高铁华蓥山隧道贯通

来源: 京华时报
2024-12-24 17:36:51

最佳回答

“JJZZ JJZZ”长8735米的JJZZ JJZZ成达万高铁华蓥山隧道贯通

  中新JJZZ JJZZ网达州12月23日电 (记者JJZZ JJZZ 刘忠俊)12月23日,随着华蓥山隧道最后一次爆破完成,新建成都至达州至万州高速铁路(以下简称“成达万高铁”)全线高风险、重难点控制性工程——华蓥山隧道顺利贯通,为全线按期建成通车奠定了坚实的基础。

成达万高铁华蓥山隧道贯通仪式现场。记者 刘忠俊 摄

  成达万高铁华蓥山隧道位于四川省渠县和大竹县交界处,全长8735米,设计时速350公里,为单洞双线、高风险瓦斯隧道。全隧Ⅳ、Ⅴ级围岩段占比达68%,隧道掘进面临着煤层采空区、突泥涌水、岩溶富水、软土浅埋等多种不良地质,存在高危有毒有害气体,建设难度系数极高。“华蓥山山岭陡窄,峰峦层叠,顶部为灰岩溶蚀后形成的槽谷,地形地貌环境极为复杂。施工中单日最大涌水量超5万立方米,相当于24个标准游泳池的水量。”中铁二局成达万高铁项目部负责人刘军称,技术团队充分利用超前水平钻探、瞬变电磁、TSP超前地质预报等技术手段,采取超前预注浆、径向注浆、设置永久排水设施等措施,确保了岩溶段施工安全。同时,配置洞内人员实时定位系统、双风机和双电源24小时不间断通风、增设瓦斯自动监测系统和专职瓦斯检测员全天候监测瓦斯、采用碱性水袋水压爆破降低硫化氢气体浓度,多维度、全方位保障隧道施工安全。

华蓥山隧道内瓦斯检测员正在查看瓦斯数据。记者 刘忠俊 摄

  成达万高铁公司达州建设指挥部指挥长张宗伟表示,四年来,300余名建设者采取分隧道进口、出口和横洞三个工作面同步施工,成功攻克高瓦斯、岩溶富水、煤层采空区等诸多困难,按期完成隧道建设任务,为山区瓦斯、岩溶等特殊地质隧道施工提供了宝贵经验。

华蓥山隧道内挖掘机、工程车正在清理转运渣土。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,线路建成后,将形成成都直达中原和京津冀地区的便捷客运通道,极大便利沿线人民群众出行,促进沿线城市经济和社会发展,对助力成渝地区双城经济圈建设、长江经济带建设等,具有十分重要的意义。(完)

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