中文摘要：

通过对4种不同吹填土开展室内自然沉降模型试验,探讨高含水率吹填土自然沉降规律。试验结果表明,随着初始含水率的增加,沉降曲线可分为固结沉降与沉积沉降;当泥浆的初始含水率大于土形成含水率时,泥浆在试验初始时刻处于沉积状态,泥浆的沉降过程经历絮凝、阻碍沉降、自重固结3个阶段;当泥浆的初始含水率小于土形成含水率时,泥浆在试验的初始时刻处于固结状态,并在自重作用下固结沉降。对于黏性土,阻碍沉降时的沉降速率随初始含水率及土样液限的增加而增加,土形成含水率为液限的9倍,自然沉降稳定时间则随相对初始含水率的增大而减小,随液限的增大而增大。对于粉质土,土形成含水率约为液限的3倍,并且自然沉降稳定时间显著小于黏性土的。

英文摘要：

Sedimentation model tests were carried out on four clays for investigating the sedimentation behavior of slurries with high water content. The test results show that the settling curves can be divided into two types, called Consolidation settling and Deposition settling, respectively. Deposition settling takes place when the initial water content of slurries is larger than Soil formation water content and the states of these slurries in Deposition state. When Deposition settling take place, Slurries would undergo flocculation, hinder settling, consolidation in settlement processes. Consolidation settling takes place when the initial water content of slurries is lower than Soil formation water content and the states of these slurries in consolidation state. For clay, the settling rate of Hinder settling increases with the initial water content and the liquid limit of clay increasing but settling time increases with relative initial water content decreasing and with the liquid limit of clay increasing. Furthermore, the soil formation water content of clay is about 9 times of liquid limits. For silts, The soil formation water content of silt are about 3 times of liquid limits and settling time less than clays＇ significantly.