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【每天排水相当于10个泳池】地下施工最怕碰到暗河或地下水,不仅会淹没机器设备,还可能影响人身安全。八达岭隧道施工区域每天正常涌水量近1.9万立方米,相当于一天要抽干10个标准8道游泳池的蓄水量。
——“没有金刚钻不揽瓷器活”,中国技术再升级!
(图:品字施工法)
【创新“品”字工法】京张项目总工程师罗都颢说,长城站隧道采用大跨度设计,如果用传统的“挪威法”,步骤比较多,施工时间也较长。专家们经过钻研,提出“品字形”施工工法,既可以安全快速施工,也方便大型机械展开。
【电子雷管爆破】使用电子雷管精细化分段,逐孔起爆,能将振速控制在安全范围内,保护文物也确保施工质量。2016年3月开工以来,这里已经爆破了4500多次。
(图:智能交通系统)
【信息技术提高效率】三年内建成一座地下102米的大型高铁车站,工期紧、任务重。施工单位运用BIM技术、人车定位系统、智通交通指挥系统等,提高了作业和管理效率。
(图:施工现场)
【总体工程已完成40%】“我们目前已经完成总体工程的40%左右,争取2019年底前实现京张高铁建成通车。” 中铁五局京张项目部党工委书记贾友文说。
新华社记者 丁静 梁赛玉 李文 谢晗
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