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研究目的:本文结合武广客运专线的路基填料改良工程,对泥质粉砂岩化学改良进行试验,以研究其作为客运专线铁路路基填料的可行性。研究结论:泥质粉砂岩化学改良后的物理力学性质有明显改善,特别是力学强度及水理性得到较大提高,能满足铁路路基填料的要求。因此,用生石灰作为全风化和强风化泥质粉砂岩的改良剂是可行的。
Research purposes: In this paper, combined with the subgrade filler improvement project of Wuhan-Guangzhou Passenger Dedicated Line, the chemical improvement of argillaceous siltstone is tested to study its feasibility as a railway subgrade filler for passenger dedicated railway line. Research conclusions: Physical and mechanical properties of shaly siltstone improved obviously, especially the mechanical strength and water ration have been greatly improved, which can meet the requirements of railway subgrade filler. Therefore, it is feasible to use quicklime as a modifier for fully weathered and strongly weathered argillaceous siltstones.