Wide embankments with a width of tens or even hundreds of meters change the settlement distribution mode of soft ground. At the same time, the influence of embankment height on the stability and settlement of soft ground is quite significant. For the wide and high embankments, when the prefabricated vertical drain (PVD) is applied in the middle of the embankment and the cement-soil mixing pile (CSMP) is implemented on both sides of the embankment, a novel determination approach of the reasonable proportion of the suitable treatment range of the PVD and the CSMP is proposed in this study. Combined with the engineering example of the Sanya Station yard of Hainan East Ring Railway, the Plaxis 2D finite element program is used to carry out the parameter analysis on the different proportions of PVD and CSMP in treatment ranges. It is confirmed that the proportion of the PVD and the CSMP in this project is between 2:3 and 4:1, which is consistent with the final design scheme provided by the design company. The on-site monitoring results of this site show the effectiveness of the determination approach proposed in this paper.

中文翻译：

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软土地基宽高路堤预制垂直排水沟和水泥土搅拌桩处理范围确定的新方法

宽度达数十米甚至数百米的宽堤改变了软土地基的沉降分布模式。同时，路堤高度对软土地基稳定性和沉降的影响也相当显着。针对宽高路堤，路堤中部采用预制垂直排水沟（PVD），路堤两侧采用水泥土搅拌桩（CSMP）时，合理配比的确定新方法本研究提出了PVD和CSMP的合适治疗范围。结合海南东环铁路三亚站场工程实例，利用Plaxis 2D有限元程序对处理范围内不同比例的PVD和CSMP进行参数分析。经确认，本项目中PVD与CSMP的比例在2：3至4：1之间，与设计公司提供的最终设计方案一致。该站点的现场监测结果表明了本文提出的判定方法的有效性。