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大西客运专线主要经过高烈度的巨厚黄土区,沿线地质条件复杂,优质填料十分缺乏,对普通填料进行改良,使其从技术和经济上都达到高速铁路路基对填料的要求,从而扩大填料的使用范围。以大西客运专线沿线山西境内黄土为研究对象,利用GDS动三轴仪对水泥改良后的黄土进行动三轴试验,研究机车振动荷载下水泥改良黄土变形量随水泥配比、试样埋深、振动次数的变化规律,获得水泥改良黄土在机车振动条件下的变形性质,结论认为水泥改良黄土的动力变形可以满足填料的设计要求。
The Daxi Passenger Dedicated Line mainly passes through the extremely thick and thick loess area with complicated geological conditions along the route, and the lack of high-quality filling material improves the ordinary filling material to meet the requirements of high-speed railway embankment for packing technically and economically so as to expand the packing Use range. Taking the loess in Shanxi Province along the West-Passenger Dedicated Line as the research object, the dynamic and triaxial tests of cement-improved loess were carried out by using GDS dynamic triaxial apparatus. The deformation of cement-improved loess under vibration load of locomotive was studied with cement proportion, depth of specimen, The variation regularity of the number of vibration, the deformation character of the cement-improved loess under the condition of locomotive vibration was obtained. The conclusion is that the dynamic deformation of the cement-loess can meet the design requirements of the filler.