在既有线下进行桥涵顶进施工,由于需要架空线路,长期以来,这种施工都是按列车限速15～25km/h安排的。 由于当前各铁路干线的运输都已迅速发展,运输能力已大部分处于饱和和十分紧张的状态,如果由于桥涵的顶进施工,需要再对这些繁忙的铁路线提出严格的限速要求,这将对 In the existing line under the bridge culvert jacking construction, due to the need for overhead lines, for a long time, this construction is based on the train speed limit 15 ~ 25km / h arrangement. Due to the rapid development of transport of all railway lines, most of the transport capacity has been in a state of saturation and tension. If the construction of bridges and culverts requires further stringent speed restriction requirements on these busy railway lines, Correct