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在沿线缺乏优质填料的情况下,为满足高速公路路基施工要求,黄土需采取处治措施后才能用作路基填筑。该文通过试验研究了不同方案的处治黄土物性指标、击实特性以及强度与变形特性,确定了黄土填料最佳处治方案,并对其长期性能进行研究。结果表明:处治后黄土的液限、塑限和塑性指数均增大,但液限提高程度相对塑限要大;处治后黄土的强度和变形满足规范要求;不同方法的处治效果依次为:水泥处治>水泥+石灰处治>石灰处治;在最优含水率附近施工能获得较高的早期强度。
In the absence of high-quality filler along the line, in order to meet the highway subgrade construction requirements, loess need to take measures to be used as subgrade filling. In this paper, we studied the physical properties, compaction characteristics and strength and deformation characteristics of loess under different schemes through experiments and determined the best treatment scheme of loess filler, and studied its long-term performance. The results show that the liquid limit, the plastic limit and the plasticity index of loess are increased after treatment, but the increase of liquid limit is relatively larger than the plastic limit. The strength and deformation of loess after treatment meet the requirements of the specification. The treatment results of different methods are as follows: cement Treatment> Cement + Lime Treatment> Lime Treatment; Construction near the optimal moisture content can achieve higher early strength.