The vacuum preloading technique is extensively employed for ground improvement, particularly for slurry ground characterized by high‐water content and low strength. Such ground frequently exhibits a delay in pore water pressure dissipation when treated with prefabricated vertical drains. To clarify the drainage and consolidation behaviour of high‐water content slurry ground under vacuum preloading, this study proposed a two‐stage combined model that integrates both filtration and consolidation processes. Initially, an axisymmetric filtration model was used to describe the formation of the soil column through the radial migration and compaction of the particles. The end‐of‐filtration radial distributions of void ratio, permeability coefficient, and effective pressure served as initial conditions for the consolidation stage analysis. This stage was depicted using a large strain consolidation model based on the free strain condition. The results showed the necessity of incorporating the filtration stage to capture the overall drainage mechanism and characteristics of slurry ground with vacuum preloading treatment.

中文翻译：

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真空预压处理浆液地面两级联合过滤固结模型


真空预压技术广泛应用于地基改良，特别是对于高含水量、低强度的泥浆地基。当用预制垂直排水沟处理时，此类地面经常表现出孔隙水压力消散的延迟。为了阐明真空预压下高含水泥浆地基的排水和固结行为，本研究提出了一种集成过滤和固结过程的两阶段组合模型。最初，使用轴对称过滤模型来描述通过颗粒的径向迁移和压实形成的土柱。过滤结束时孔隙率、渗透系数和有效压力的径向分布作为固结阶段分析的初始条件。这个阶段是使用基于自由应变条件的大应变固结模型来描述的。结果表明，有必要结合过滤阶段来捕捉真空预压处理浆料地面的整体排水机制和特性。