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由于受施工季节和施工条件的限制,铺设无縫线路时,往往不能在中和溫度进行锁定,这给维修养护工作带来很多困难。如锁定轨溫偏低,不仅维修养护工作受到许多限制,而且高溫时钢轨受到很大的溫度压力,加之长钢轨不均匀爬行造成“应力集中”,就有胀轨跑道的危险;反之如锁定轨溫偏高,低溫时钢轨受到很大的拉力,线路不均匀爬行后,某些地段拉应力增大,溫度拉力与爬行附加拉力合在一起,容易拉断螺栓或引起钢轨折断。因此,对非中和溫度锁定的无縫线路,特别是低溫锁定或已产生严重“应力集中”的无
Due to the construction season and construction conditions, laying of seamless lines often can not be locked in the neutralization temperature, which brings maintenance and maintenance work to bring many difficulties. If the locking rail temperature is low, not only maintenance and maintenance work is subject to many limitations, and the rail temperature is subject to high temperature and pressure, coupled with uneven creeping long rail caused by “stress concentration”, there is the danger of expansion track; Temperature is high, low temperature rail by a lot of tension, uneven crawling lines, some sections of the tensile stress increases, the temperature pull and crawling additional pull together, easy to break the bolt or cause the rail to break. Therefore, for non-neutralized temperature-locked seamless wiring, especially for low-temperature lock-in or for severe “stress concentration”