This paper aims to establish an analytical model on vacuum consolidation of dredged slurry treated by PVD with special considerations on the clogging effects. A series of laboratory tests have been conducted to characterize the temporal/spatial variations of the clogging zone and the vacuum pressure in soil. Based on the nonlinear relationship between the compressibility, the permeability and the void ratio (e-p and e-k curves), an analytical model incorporating the clogging zone was proposed and solved considering the nonlinear attenuation of the vacuum pressure. The solution was verified and validated by comparing with published data and field test results, respectively. Parametric studies reveal that the clogging significantly slows down the consolidation rate, and thus reduces the final degree of consolidation of the dredged slurry.

本文旨在建立PVD处理的疏slurry泥浆真空固结的分析模型，并特别考虑堵塞效应。已经进行了一系列的实验室测试来表征堵塞区域的时间/空间变化以及土壤中的真空压力。基于可压缩性，渗透率和空隙率之间的非线性关系（ep和ek曲线），提出了一个包含堵塞区域的分析模型，并考虑了真空压力的非线性衰减进行求解。通过分别与已发布的数据和现场测试结果进行比较，对解决方案进行了验证和验证。参数研究表明，堵塞明显减慢了固结速度，从而降低了疏slurry泥浆的最终固结度。