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通过对采取的代表性弱膨胀土和中等膨胀土试样进行石灰改良前后的室内试验研究,得到膨胀土改良前后的土性变化规律,试验研究结果表明膨胀土填料经石灰改良后,其粘粉粒含量减小、塑性指数降低、胀缩性降低、力学强度提高、压缩性减小、水理性增强,填料的工程性质大大改善,可用于高速铁路路基填筑。
Through the indoor experiment before and after the lime improvement of the representative weak expansive soil and medium expansive soil samples, the change rule of the expansive soil before and after the improvement is obtained. The experimental results show that the expansive soil filler modified with lime has the following properties: The content of the pellet is reduced, the plasticity index is reduced, the shrinkage and shrinkage is reduced, the mechanical strength is increased, the compressibility is reduced, the water rationality is enhanced, and the engineering properties of the filler are greatly improved, which can be used for embankment filling of high speed railway.