7月3日，昆明地铁5号线圆通公园站至翠湖站区间左线“穿越者1号”盾构机顺利始发，昆明地铁5号线圆-翠区间隧道左线开始掘进施工。“穿越者1号”盾构机的到来，为在复杂的喀斯特地貌条件下施工增添了利器。
据悉，圆通山至翠湖区间的地铁左线全长1017.64米，隧道埋深20米至52米。该线路地处昆明市中心，施工范围内房屋众多、地质条件复杂，并下穿昆明动物园、圆通寺等公共活动区域。盾构机施工将从翠湖站沿华山西路，下穿诸多建筑物及给水、排水、城市照明等复杂管线，到达圆通山矿山段，通过矿山段在竖井接收，共计需完成管片849环的拼装。
据介绍，“穿越者”盾构机重达500吨，光从地面用吊车吊到地下，就用了10天的时间。据了解，“穿越者一号”盾构机整机长80米，开挖直径6.48米，针对圆-翠区间溶洞多、岩层强度高、地层富水等不良地质因素，专门配置了重型刀盘、刀具，选用了加强型盾尾刷，增添了二次补强注浆专用设备。通过加强设备功能，大大提升了盾构机的适应性，为其下穿房屋、通过不良地质地段打下了坚实基础。
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