
经过1320天施工,西渝高铁康渝段向阳二号隧道顺利贯通,为全线按期建成通车奠定基础。
10月20日,历经1320天施工,全长12673米的西渝高铁康渝段向阳二号隧道顺利贯通。该隧道地处四川省达州市宣汉县大巴山腹地,属Ⅱ级高风险隧道,为全线按期建成通车奠定坚实基础。
AI-generated summary
西渝高铁是国家“八纵八横”高速铁路网中京昆通道、包海通道的重要组成部分。
中新网达州10月20日电 (记者 刘忠俊)10月20日,经过1320天施工,西安至重庆高速铁路(以下简称“西渝高铁”)康渝段控制性工程之一——向阳二号隧道贯通,为全线按期建成通车奠定基础。
向阳二号隧道贯通仪式现场。记者 刘忠俊 摄
据了解,向阳二号隧道位于四川省达州市宣汉县,地处大巴山腹地,全长12673米,设计时速350公里,为单洞双线隧道,最大埋深约1150米。洞内Ⅳ级、Ⅴ级围岩占比高,穿越强岩溶、高瓦斯、岩层破碎带、软岩大变形等不良地质,地质上“三高”“四多”叠加,即高水头、高瓦斯、高陡危岩和断层褶皱多、煤系地层多、暗河管道多、滑坡岩堆多,属Ⅱ级高风险隧道,是全线施工的重难点。
“隧道地质条件复杂,涌水、涌泥、高瓦斯等风险交织在一起。”中铁二十局西渝高铁项目一分部经理李成志介绍,施工中,项目部依托高精度超前地质预报系统,把岩溶、破碎带、瓦斯等风险提前识别、提前处置;针对岩溶区高压涌水,采用泄水引流、帷幕注浆、危岩加固等成套工艺,形成了复杂岩溶地区涌水治理的成熟方案;瓦斯监测则把自动化监测与人工检测结合起来,对有毒有害气体连续、定点、远距离监测,并配套声光报警。
向阳二号隧道内挖掘机正在清理渣土。记者 刘忠俊 摄
为加快进度,隧道划分为4个工区、6个工作面平行施工,投用C7多功能钻机、三臂凿岩台车、拱架一体化台车等大型智能化设备,并配套智能钢构厂,生产效率较传统方式明显提高。3D扫描、电子沙盘、BIM等系统的应用,让现场安全、质量和进度同步推进,国内同类复杂地质长隧施工由此多了一份可借鉴的经验。“西渝高铁康渝段已贯通隧道68座,工程进入无砟轨道施工、站房建设及四电工程安装等剩余工程的关键攻坚阶段。”京昆高速铁路西昆有限公司达州指挥部党支部书记姚云晓说。
工程技术人员正在向阳二号隧道内开展测量作业。记者 刘忠俊 摄
西渝高铁是国家“八纵八横”高速铁路网中京昆通道、包(银)海通道的重要组成部分,正线全长约739公里,分西安至安康、安康至重庆(康渝段)两段建设,并同步建设全长约90公里的樊哙经开州至万州连接线。目前,西安至安康段已于9月28日开通运营。
AI outlook — possibilities, not facts
西渝高铁康渝段将推进无砟轨道施工及站房建设等剩余工程
Very likely · Within months

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