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首次大修 快铁医生驾“百万豪车”检修轨道
2017-08-26 03:56:52 中国青年网
小黄车出诊
检修队每小时前进100米
“如果你乘坐成渝高铁就可以发现,一枚硬币可以轻松立稳,但在成灌快铁立不起来。”李坤打了一个恰当的比方,一条高速公路开个三五年,原本平整的路面就会出现坑洼,成灌快铁也是同理,只不过存在的是轨道尺寸误差问题。
夜间的铁路轨道,一片漆黑,数十个亮晃晃的头灯,机器轰鸣的声音,铁轨的敲击声,交织在一起。
整个检修分为三大步骤,首先是精调,技术人员推着一台黄色小车,沿着轨道缓慢前行,小车上有一个显示屏,可以把轨道的精确坐标测量出来,精度是0.0001毫米。可别小看这台叫做“安博格”的小车,价值上百万,被大家笑称为“百万豪车”。简单来说,小车一开过去,便能测量出此处铁轨上下左右存在的误差。
在精调后,后续两个工程组紧接着跟进,如果需要调整轨道误差,需要把固定铁轨的弹条一 一松掉,用千斤顶把铁轨顶起来,通过更换垫板和轨距块,调整轨道的上下左右误差。
通过前后三次检测,可以把轨道误差精确地控制在0.5毫米以内,因为要控制精度,加上成灌线双线1公里有6400根轨枕,每天晚上,整支队伍只能完成330米至350米作业,平均每小时前进100米。
李坤说,对检修影响最大的其实是降雨,人淋雨没事,但机器不能淋雨,雨太大,测量精度也无法保证。每天凌晨的这样一次检修,铁路检修人员将要持续到9月,直到完成成灌快铁首次大修。
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