Review of research on high-speed railway subgrade settlement in soft soil area

Railway Engineering Science

Yao Shan¹  Binglong Wang¹  Shunhua Zhou¹ 

[1]Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University

关键词: High-speed railway;    Subgrade;    Soft soil foundation;    Pile-supported embankment;    Soil arching;    Settlement prediction;   

DOI  :  10.1007/s40534-020-00214-x

来源: DOAJ

【 摘 要 】

Abstract Construction issues of high-speed rail infrastructures have been increasingly concerned worldwide, of which the subgrade settlement in soft soil area becomes a particularly critical problem. Due to the high compressibility and low permeability of soft soil, the post-construction settlement of the subgrade is extremely difficult to control in these regions, which seriously threatens the operation safety of high-speed trains. In this work, the significant issues of high-speed railway subgrades in soft soil regions are discussed. The theoretical and experimental studies on foundation treatment methods for ballasted and ballastless tracks are reviewed. The settlement evolution and the settlement control effect of different treatment methods are highlighted. Control technologies of subgrade differential settlement are subsequently briefly presented. Settlement calculation algorithms of foundations reinforced by different treatment methods are discussed in detail. The defects of existing prediction methods and the challenges faced in their practical applications are analyzed. Furthermore, the guidance on future improvement in control theories and technologies of subgrade settlement for high-speed railway lines and the corresponding challenges are provided.

【 授权许可】

Unknown