世界最长海底高铁隧道建设取得重大突破|久久久久国产精品无码免费看

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  中新网杭州11月28日电(王逸飞 许文峰 余剑波 周俊)28日,在甬舟铁路金塘海底隧道舟山侧施工现场,“定海号”盾构机掘进里程成功突破5000米大关,标志着该隧道全长6270米的舟山侧盾构段已完成约80%的掘进任务,世界最长海底高铁隧道建设取得重要进展。

建设团队庆祝“定海号”盾构机掘进突破5公里。中铁十一局供图

  金塘海底隧道是甬舟铁路全线控制性工程,横跨宁波与舟山之间的金塘水道,全长16.18公里,其中盾构段长11.21公里。隧道采用两台大直径盾构机——“定海号”与“甬舟号”,分别从舟山、宁波两侧同步始发、相向掘进,在穿越高水压及多种复杂地层后,将在海底实现高精度对接。

  金塘海底隧道地质条件极为复杂,盾构段需穿越长距离硬岩、黏土与粉砂复合地层,施工面临高强度、高水压、高精度与高风险等多重挑战。目前,“定海号”已进入海底砂层掘进阶段。针对砂层透水性强、稳定性差等问题,建设团队通过加强盾尾密封管理、优化掘进参数、合理控制推进速度等措施,有效控制地层扰动,并结合同步注浆与实时监测,动态调整盾构姿态,保障施工安全。

  随着隧道埋深加大,地质条件日益复杂,施工风险持续上升,对人员操作和设备运行提出更高要求。为此,项目团队特邀盾构专家对设备进行全面“体检”,确保其处于良好工作状态,并利用管片拼装、交接班等工序间隙开展“碎片化”维保,提升施工连续性和整体效率。

工作人员对“定海号”盾构机主驱动进行日常维保。张玺  摄

  据悉,下一步,“定海号”盾构机将以最佳状态向海底对接点持续推进。目前,宁波侧“甬舟号”盾构机也在稳步推进中。预计2026年10月,两台盾构机将在海底实现精准对接、胜利“会师”。

  甬舟铁路是国家《中长期铁路网规划(2016-2030年)》重大项目,线路西起宁波东站,经宁波市鄞州区、北仑区,通过新建海底隧道至舟山市金塘岛,通过新建跨海大桥至册子岛及舟山本岛,终至定海区白泉镇,线路全长76.4公里,设计时速250公里。

  甬舟铁路计划于2028年具备开通运营条件。项目建成运营后,将结束舟山群岛不通铁路的历史,长三角唯一不通高铁的地级市舟山将接入全国铁路网,对推动宁波舟山同城化发展,加快两地融入“一带一路”和长江经济带,促进长三角一体化高质量发展等具有重要意义。(完)

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