杭绍台铁路池塘山 一号隧道顺利贯通

发布时间:2020-05-22
 5月20日,杭绍台铁路池塘山一号隧道顺利贯通。这是继井头山隧道、泾西二号隧道贯通后,杭绍台铁路六标段实现的隧道“三连贯”。至此,项目共完成隧道开挖4.17公里,占标段内隧道长度84%,为按期完成箱梁建设奠定了基础。
  
  据悉,池塘山一号连接临海市和椒江区,隧道全长2593米,为双线隧道,是标段内最长的隧道,洞内宽度14.5米,高度9米,最大埋深达到429米。该隧道区围岩主要为凝灰岩,区域断层发育,围岩破碎松散,易发生坍塌、岩爆、高地温热害等,加之岩体裂隙水较发达,施工难度大,安全风险高。
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  “在施工中,针对岩爆区域温度高,我们采用安装风机、喷淋岩面等措施降温,同时两班轮换作业,确保施工安全。”中铁大桥局二工区现场负责人刘学林介绍。
  
  池塘山一号隧道施工以来,中铁大桥局杭绍台项目部严格遵循“短进尺、弱爆破、强支护、快封闭、勤量测”的施工原则,并结合现场实际制定施工方案,采取两个作业面同时开挖作业,最终实现隧道如期贯通。
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