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通过筛分、标准重型击实、三轴及X衍射等试验分析,探讨了按现行铁路路基设计规范对红砂岩等软岩粗粒土填料进行分组存在较大的不确定性;建议在填料分组及其选用填料时,应考虑填料矿物成分、填料强度及其衰减特性等综合因素;结论对红砂岩粗粒土等软岩用作路基填料的设计与施工具有参考价值。
Through the analysis of screening, standard heavy compaction, triaxial and X-ray diffraction, it is discussed that there is great uncertainty for grouting soft rock coarse grained soil such as red sandstone according to the current railway subgrade design code. And the choice of filler should take into account the composition of filler mineral composition, filler strength and attenuation characteristics of a combination of factors; Conclusion Red sandstone coarse grained soil and other soft rock used as a roadbed filler design and construction of reference value.