Study on the Strain Law of Coarse-grain Soil Packing in High-speed Railway Subgrade Under Vibrational Load
In order to improve the safe service performance of high railway foundation soil,the dynamic characteristics of coarse grained soil filler under vibration load were tested by indoor dynamic triaxial test.The cumulative strain curve of coarse grained soil filler under different fine particle content and confining pressure was compared and analyzed.The results show that when the dynamic stress is 30 kPa,the cumula-tive plastic strain of all fine grained soil and confining pressure increases rapidly at first and then slowly with the increase of loading times.When the dynamic stress is 60 kPa and 90 kPa,the cumulative plastic strain of the soil under all fine grained soil content and confining pres-sure conditions increases rapidly at first and then tends to be stable with the increase of loading times.
High railway baseVibration loadCoarse-grained soil fillerDynamic characteristicsFine grain content
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