铁路线路如何“舒筋活血”?大型金色“战甲”组团出战|欧美一区二区三区成人片在线
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万里铁道线上,有一种神秘列车,它们身披金黄色“战甲”,日夜兼程、跨越千里,为铁路线路“舒筋活血”。
近日,记者在兰州铁路局了解到,钢轨下铺满的碎石,学名道砟。列车驶过时,道砟相互摩擦挤压,像弹簧减震器一样,既可分散巨大冲击力,在雨雪季又能排出线路积水,让列车平稳运行。在列车的长期碾轧下,道砟会出现破碎情况,从而混入泥土等污物,导致道床变硬结块失去弹性。所以,定期清筛可改善线路平顺性,提高运输效率。
把成吨板结的石砟挖出、筛分、铺填……以前这些步骤要靠人工完成,费时费力。现在,身怀绝技的大型养路机械组团出征。各式大型清筛车将筛分后的洁净石砟通过回填装置落入道床中,污土则顺着输送带送入前方的物料车内。捣固车调整线路几何尺寸,稳定车夯实稳定道床……它们有序配合,消除线路病害。
这些黄金“战车”科技含量高,集机械、液压、气动、电气设备于一身,车型种类不一、结构复杂、零部件成千上万,个个都是中国制造。(制作 高莹 视频来源 兰州铁路局)
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