二灰改良土高铁路基变形的数值模拟分析

二灰土具有后期强度高、抗冻性能好、整体性强、造价经济等特点，在地基以及普通路基中已经得到广泛地应用，但是在高铁工程中作为路基填料应用很少。以哈大高铁皇姑屯段为背景，利用有限元软件ADINA分别对A、B组土、二灰土在不同车速、不同加速度、不同轴重的条件下作路基填料进行模拟，并将结果进行对比，得出在不同条件下，二灰土作填料的高铁路基其竖向位移都小于AB组土路基的竖向位移，说明二灰土可以作为高铁路基的填料。

Analysis on Numerical Simulation of Deformation of Express Railway Subgrade Improved by Lime-ash Soil

Lime-ash soil, being of high strength, good frost resistance, good integrity and economic cost in late stage, has been applied widely in foundation and ordinary subgrade engineering, but rarely as subgrade filler in express railway engineering. Taking Huanggutun Section of Harbin-Dalian Express Railway as the background, with the software ADINA, the situations of both AB fill soil and lime-ash soil as subgrade filler under different speeds, different accelerations and different axle loads were simulated, and then the results were compared. The conclusion is that under different conditions, the vertical displacement when lime-ash soil as subgrade filler for express railway is less than that when AB fill soil as the filler, demonstrating that lime-ash soil could be filler of express railway subgrade.