This study aims at establishing the hydraulic conductivity–effective vertical stress–void ratio interrelations for naturally sedimented clays under one-dimensional condition. The roles of soil structure developed during the depositional and the post-depositional processes in both the relationships of hydraulic conductivity versus effective vertical stress and void ratio versus effective vertical stress are investigated. It is found that the soil structure effect on the hydraulic conductivity–effective vertical stress curves can be attributed to that on the compression curves. The effect of initially deposited state on the hydraulic conductivity is also linked with that on the void ratio for naturally sedimented clays under the same values of effective vertical stress. The investigations indicate that the interrelation between hydraulic conductivity and compressibility is independent of initial state. That is, the hydraulic conductivity–void ratio relationship of naturally sedimented clays is independent of soil structure and initial state. Such a relationship is found to be a function of void ratio at liquid limit. Consequently, the hydraulic conductivity can be estimated based on the hydraulic conductivity–void ratio database established for naturally sedimented clays with a wide spectrum of void ratio at liquid limit. An empirical way of determining hydraulic conductivity is also proposed for naturally sedimented clays. A series of one-dimensional incremental load consolidation and hydraulic conductivity tests were performed. These data together with those compiled from the literature are used for investigating the accuracy of the suggested methods of determining hydraulic conductivity.

本研究旨在建立一维条件下天然沉积粘土的水力传导率-有效垂直应力-空隙比的相互关系。研究了在沉积和沉积后过程中形成的土壤结构在导水率与有效垂直应力和空隙率与有效垂直应力的关系中的作用。结果表明，土壤结构对水力传导率-有效竖向应力曲线的影响可归因于压缩曲线上的影响。在相同的有效垂直应力值下，初始沉积状态对水力传导率的影响也与自然沉积粘土的孔隙率的影响有关。研究表明，水力传导率和可压缩性之间的相互关系与初始状态无关。也就是说，天然沉积粘土的导水率-空隙比关系与土壤结构和初始状态无关。发现这种关系是液限空隙率的函数。因此，水力传导率可以基于为天然沉积粘土建立的水力传导率 - 孔隙率数据库进行估算，在液限下具有宽范围的孔隙率。还提出了一种确定天然沉积粘土的水力传导率的经验方法。进行了一系列一维增量载荷固结和水力传导率测试。