几十年来,我段在处理线路沉陷,开挖路基,埋设过道涵等工程;均用吊轨法,限速25～35公里/小时进行施工,极大地影响运输效能。随着列车密度增大,采用原来的方法施工,越来越困难。为解决施工与运输的矛盾,提高线路通过能力,确保安全施工,根据“标准大043”技术标准,以P50轨和J F6型机车为准,不限速容许最大跨度3.19米进 For decades, I have been dealing with subsidence of the line, excavation of subgrade and embarkation of aisle culvert. All of them use the hanger rail method and the speed limit is 25-35 km / h for construction, which greatly affects the transportation efficiency. As the train density increases, using the original method of construction, more and more difficult. In order to solve the contradiction between construction and transportation, and to improve the capacity of the line to ensure safe construction, according to the “standard 043” technical standard, the P50 rail and J F6 locomotive shall prevail. The maximum speed without speed limit is 3.19 meters