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地平线下的尖刀战士

2017-08-21 05:46:32   中国青年网

这是一个平均年龄23岁的青春方阵。别看他们满脸稚气,但500多吨的大家伙盾构机对他们“唯命是从”。四年里,他们在长春地铁施工中安全掘进8000多延米,创造了高寒地区地铁盾构施工纪录。他们,就是中国铁建二十二局一公司长春地铁盾构突击队。

中国铁建二十二局一公司负责施工长春地铁1、2号线3个标段的3个盾构区间,掘进长度8000余延米。这里位于高纬度高寒地区,特别是2号线地质复杂,施工难度很大。

“如果说盾构机是尖刀,那么,盾构作业队的人们特别是主操作手就是手持尖刀的勇敢战士!”多次被集团公司评为“十大杰出青年”“优秀共产党员”的突击队队长、项目经理韩震说。

2013年10月,当盾构机从1号线始发时,他带领盾构队员成立了青年突击队,将“尖刀”狠狠地刺向岩层。挑战总是不期而至。2017年3月,盾构掘进至300多环时,操作手于江河发现掘进速度降低,出土量超排。“此种情况下,地层易产生过大沉降,甚至塌方。”韩震说。

就在于江河认真观察时,螺旋机出口突然传来一声闷响。他和工人们惊讶地发现,其中喷出的尽是稀泥浆,“不好,前方喷涌了!”于江河说,当时他只感到“脑袋嗡地一声响,瞬间有点发蒙”。但很快他就清醒过来,组织工人将螺旋机渣土出口调小,同时严格控制盾构机掘进速度。

“此时,盾构机刚进入伊通河东岸,正要过河,掌子面富水,他采取的这两项措施太重要了!如若不当,喷涌甚至会直接将盾构机淹没。”32岁的盾构队副队长赵基鹏在加入一公司之前,曾参加过两个盾构项目施工,可提起那次突发情况,他还是心有余悸。

之后,韩震和项目部总工程师李建军等经过研究,决定改进掘进参数,改良渣土,调整泡沫及土仓加水比例,保持掘进速度平稳,最终顺利穿过伊通河。

如果说盾构机的主操作室是神经中枢,动力系统则是它的心脏,密密麻麻的管线包括油管、线路等,将盾构机前盾、中盾和尾盾连接起来,透过主操作室进而指挥、控制盾构机掘进。机电等日常维护保养直接决定这个大家伙的战斗力,机电工程师可谓“心脏的心脏”。

盾构机的千斤顶有4个区,用于顶起管片安装在隧道上。2016年4月,操作人员像往常一样向其中一个区轻轻加压,可千斤顶纹丝不动,再稍微加大些压力,千斤顶却猛地升高很多。

问题究竟出在哪儿呢?在把线路全部拆掉重新连接后,机电工程师终于找到了罪魁祸首:是中间继电器出现问题!“机电维护保养,就如同盾构机的‘保姆’,随时发现问题随时解决!”盾构队机械主管姜汉玉说。

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