Chemical consolidation may occur when a salt solution infiltrates into a clay soil. To date, most studies have considered solute diffusion alone, ignoring advective transport processes. This may be justified for some clays, however for other clays osmotic flows can be significant, and so require a careful analysis of solute advection. This paper considers the influence of solute advection on coupled chemical and mechanical consolidation of clays. The theoretical and numerical study considers both transient and steady-state solutions. It is found that solute advection can have a large effect on computed solute concentrations, excess pore water pressures, and settlements. The effects of including solute advection become increasingly important for osmotic efficiencies greater than 0.005 and when the ratio of chemical to mechanical coefficients of volume change become greater than 0.005. The differences in estimated responses of the clay, based on models with and without solute advection, can be as large as one order of magnitude.