由于铁路基床承载力不足,引起轨道几何尺寸变化,从而影响列车快速运行这一问题,铁路有关部门已进行了大量的试验研究工作,投入了相当大的人力物力资源,提出了许多方法。如基床换填法、塑料排水板封闭基面法、石灰桩和水泥桩复合地基法等。这些方法都取得 Due to the lack of bearing capacity of the railway bed and the change of orbital geometry, thus affecting the rapid train operation, the relevant railway departments have carried out a great deal of experimental work, put in considerable human and material resources and put forward many methods. Such as bed for filling method, plastic drainage board closed basal plane method, lime pile and cement pile composite foundation method. These methods are achieved