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维护申城“地下动脉”的守夜人

2017-08-27 08:06:57   中国青年网

工程人员在个别隧道区间安装内张钢圈。

维修人员在检查电网。

8月25日深夜11时30分,一路轨道交通维护人员来到四号线上海体育馆站地下。开始了地下轨道交通线路的维护保养。

由于地铁延长运营时间,在部分线路上,这些工程人员能利用的维护时间只有以前的一半,他们要在地铁停止运营的几个小时里,为地铁安全运营“查缺补漏”。

当晚的一个施工内容是壁内注浆隧道补漏,需要补漏的位置是一条矩形块伸缩缝。该处渗漏水正好滴落到钢轨上,长此以往会导致钢轨锈蚀,减少钢轨寿命,增加维护成本,所以需要及时处理。

除这一组在施工外,隧道中同时还有其他施工工种,在梯车上工作的供电公司员工正在对接触网进行检修。接触网是给地铁供电的设备,如果出问题将会影响数个区间的列车供电。而在另一条隧道中,施工人员在进行内张钢圈项目施工。为了保证隧道结构的稳定,提供更好的乘车舒适感,工程人员在个别隧道区间安装了内张钢圈。

记者采访离开隧道时已是26日凌晨3时许,但工人们仍然在紧张地忙碌。

本报记者 张海峰 摄影报道

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