Due to waste accumulation and the capping weight of landfill

mechanical consolidation would happen in impervious barrier of the landfill liner under pressure. The chemical consolidation can also happen when the contaminant transports through the barrier. Then

the above effect of soil consolidation would not only induce contaminant advection

but also make the changes of its inherent transport property

such as soil volume and structural transformation. A hydro-chemo-mechanical contaminant transport framework is established

which is based on the mixture theory. It is able to describe systematically the coupling deformation under the hydro-chemo-mechanical effect

the water absorption and desorption

advection and diffusion. The influence of the hydro-chemo-mechanical coupling effect on the inherent transport property is considered with the changing of macroscopic pores. The contaminant transport is simulated using the coupling advection and diffusion flux. Then

the parametric analyses about consolidation load

diffusion-consolidation coefficient

coupling deformable effect

desorption effect and effective osmotic coefficient are progressed. The analyzing results indicate that if the difference between the adsorption water and free water in the soil of the landfill liner is larger

the more adsorption water would be desorbed. However

when the adsorption water is desorbed

the degree of soil consolidation would be changed with the soil characteristic which is hard or soft. If the overlying load is larger

the effect of limiting expansion of the macroscopic pore in the soil is larger. Subsequently

the velocity of contaminant transport would be reduced.