泡沫轻质土在临近营业线的铁路软弱地基处理中的应用

高速铁路引入既有客运专线车站路基时，由于新线路基施工，可能导致临近营业线路基变形过大而直接威胁到运营线行车安全。商合杭高铁肥东站路基工程设计，拟采用泡沫轻质土填筑路基，通过数值模拟研究分析了填筑泡沫轻质土路基的可行性。结果表明:泡沫轻质土用于基床以下本体路基填筑时，新线路基沉降满足设计要求，且可有效减少既有线的附加沉降。

Application of Foamed Lightweight Soil in Soft Ground Treatment of Railway near the Business Line

When high-speed railway is introduced into the subgrade of existing passenger dedicated railway line, the construction of new line subgrade may lead to the large deformation of the subgrade of the adjoining business line which directly threatens the safety of the operation line. Taking the design of subgrade engineering of Feidong Station of Shangqiu-Hefei-Hangzhou high-speed railway as an example, the design of subgrade is carried out with foamed light soil, and the feasibility of foamed light soil subgrade is analyzed by numerical simulation study. The results show that when the foamed light soil is used to fill the subgrade under the subgrade bed, the settlement of the new subgrade meets the design requirements, and it can effectively reduce the additional settlement of the existing line.