季冻区高铁路基改良粗颗粒填料力学特性研究

Study on Mechanical Properties of Modified Coarse Particle Filler for High Railway Foundation in Seasonal Freezing Area

依托实际工程,对季冻区高铁路基改良粗颗粒填料力学性能特性进行研究,从原材料选择入手,以水泥作为改良剂,并分析其作用机理。采用单轴压缩试验研究水泥改良填料,水稳定性能和抗冻融耐久性,试验结果表明水泥改良填料无论在浸水或未浸水条件下,水稳定性能随着龄期增加而增加且优于未改良填料;水泥改良耐久性能远远大于未改良填料,满足施工要求。

Based on practical projects,mechanical properties of coarse particle filler for paste roadbed im-provement in seasonal freezing area were studied.Starting from the selection of raw materials,cement was selected as the improver,and its action mechanism was analyzed.Uniaxial compression test was used to study the water stability performance and freeze-thaw durability of the modified cement filler.The test re-sults show that the water stability performance of the modified cement filler increases with the increase of age and is better than that of the unmodified cement filler,whether it is immersed in water or not.The im-proved durability of cement is much greater than that of unimproved filler,which can meet the construction requirements.