A system of vacuum preloading combined with partially penetrating prefabricated vertical drains (PP‐PVDs) is an effective solution for promoting the consolidation of the dredged marine clay. However, a significant and traditionally challenging‐to‐predict amount of deformation or settlement occurs. Therefore, it is necessary to introduce a three‐dimensional large‐strain consolidation model to consider the length of the vertical drain to determine the consolidation time and degree of consolidation (DoC), and associated settlement. The predictions using the proposed analytical model provide fair agreements with the field data and those in the literature. Parametric studies reveal that to achieve a 90% DoC within 100 days in soft soil, the optimal penetration depth for PP‐PVDs would be 0.7 times the depth of the soil layer. With the increase of DoC, the ratio of excess pore water pressure to applied vacuum pressure (u/P) in the whole soil layer moves toward 1.0. With the increase of PVD penetration ratio (H1/H), more DoC is required to dissipate the excess pore water pressure in the top improved soil layer.

中文翻译：

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真空预压大应变固结结合部分贯通预制垂直排水沟

真空预压系统与部分穿透预制垂直排水沟（PP-PVD）相结合是促进疏浚海洋粘土固结的有效解决方案。然而，会发生显着且传统上难以预测的变形或沉降量。因此，有必要引入三维大应变固结模型来考虑垂直排水管的长度，以确定固结时间和固结度（DoC）以及相关的沉降。使用所提出的分析模型进行的预测与现场数据和文献中的数据相当一致。参数研究表明，要在软土中 100 天内实现 90% DoC，PP-PVD 的最佳穿透深度将是土层深度的 0.7 倍。随着DoC的增加，超孔隙水压力与施加真空压力之比（你/磷）在整个土层中趋向于1.0。随着PVD渗透率的增加（H1/H），需要更多的 DoC 来消散顶部改良土层中的过量孔隙水压力。