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结合武广客运专线工程,通过试验研究了全风化泥质粉砂岩的物理力学性质,石灰改良后的液塑限变化、击实特性、水稳定性、无侧限抗压强度及其主要影响因素。试验结果表明:全风化泥质粉砂岩石灰改良后塑性显著降低,亲水性减弱;随着掺入量的增加,最优含水量增大,最大干密度减小;无侧限抗压强度随着压实系数的增大而增大,随着龄期的增长而增加,随着石灰掺入量的增加先增大后减小,最佳石灰掺入量为6%;全风化泥质粉砂岩石灰改良后的物理力学性能有明显改善,特别是力学强度及水理性得到较大提高,能满足客运专线路基填料的要求。
Combined with the project of Wuhan-Guangzhou Passenger Dedicated Line, the physical and mechanical properties of fully-weathered argillaceous siltstone, the change of liquid-plastic limit, compaction, water stability, unconfined compressive strength and their main influencing factors . The results show that the plasticity of the fully-weathered muddy siltstone lime is significantly reduced and its hydrophilicity is weakened. The optimal water content increases and the maximum dry density decreases with the incorporation of lime. The unconfined compressive strength With the compaction coefficient increasing and increasing, with the increase of age, with the increase of lime content increases first and then decreases, the best lime incorporation is 6%; fully weathered muddy powder Sandstone lime improved physical and mechanical properties have significantly improved, especially the mechanical strength and water rationality have been greatly improved to meet passenger dedicated line subgrade filler requirements.