Abstract
In the light of the engineering characteristics of silty fine sand, this paper combines two engineering examples of Inner Mongolia Tongliao-Huolinhe Railway and Inner Mongolia Beijing-Tongliao Railway, respectively, physical and chemical improvements are used to study the effects of improvement measures, construction techniques and other factors on the degree of compaction of railway subgrade. The results show that the compaction of the railway subgrade has been significantly improved after the physical improvement with the addition of Group A soil and the chemical improvement with the addition of cement, which can meet the specification requirements. This shows that the improved scheme in this article is effective, and can provide engineering cases for the construction of related silty fine sand railway subgrade.
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