“西成铁路”格尔隧道贯通让高原天堑变通途|人妻奶水人妻系列
1. 哺乳期一边挤奶一边喝
2. 人妻受伤
中新网兰州11月21日电 (戴文昌 杨艳敏)21日,地处西秦岭中高山区,平均海拔3300米的青海西宁至四川成都铁路(简称“西成铁路”)(甘青段)1标格尔隧道顺利贯通,让昔日高原天堑终变通途,为西成铁路全线按期通车按下“加速键”。
作为国家“八纵八横”高铁网兰州、西宁至广州通道的关键组成部分,西成铁路串联青海、甘肃、四川三省,全线建成通车后,将加强兰(西)城市群与成渝城市群的交通联系,推动丝绸之路经济带和长江经济带互联互通。
格尔隧道位于甘肃省甘南藏族自治州碌曲县郎木寺镇境内,地处西秦岭中高山区,平均海拔3300米,为单洞双线隧道,全长1491.67米,设计时速200千米,整体呈南北走向,最大埋深约128米,最小埋深仅12米,全隧均为抗冻设防段。
更为棘手的是,格尔隧道主要以Ⅳ、Ⅴ级围岩为主,断层沟谷浅埋段众多,围岩稳定性极差,洞身穿越砾岩孤石段和强膨胀性凝灰岩段,施工难度大,加之高原地区气候多变、施工组织复杂,给工程建设带来多重挑战。
自2023年2月格尔隧道正式进洞施工以来,中铁四局西成铁路1标项目部组建专项技术攻关小组,针对高原复杂地质与恶劣气候等难题,从施工组织、资源配置到关键工期科学编排,实施全链条穿透式管理,确保各环节高效衔接、难题精准破解。
针对格尔隧道浅埋、断层破碎带、膨胀岩等地质难题,该项目部采用TSP、地质雷达等多重超前预报技术精准探测前方围岩情况,通过对围岩监控量测数据实时分析,动态调整支护措施,严格遵循“管超前、短进尺、强支护、快封闭、勤量测”施工原则,顺利通过重重险阻。
历经800余天的艰苦奋战,该项目参建团队成功克服高寒气候、复杂地质、环保要求高等多重考验,实现隧道贯通与安全质量的双重目标。

目前,作为西成铁路全线已贯通隧道中海拔最高的隧道,该关键工程的贯通不仅标志着西成铁路甘肃段施工取得重大阶段性突破,也为后续全线铺架工程的高效推进奠定坚实基础。(完)
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