In the permafrost region and artificial frozen soil engineering

there are massive interface layers between frozen soil and architectural construction

but it is lack of experimental methods for frozen soil-structure interface mechanical deformation research. For this

based on the developed apparatus called large-scale multi-functional cycle direct shear system for frozen soil-structure interface ( DDJ-1)

the shearing box of frozen soil was modified to highlight the interface layer of frozen soil

and the measuring system of tiny deformation was developed

thus the experimental system was composed. Using this system

the mechanical properties experiments of interface layer can be performed under different boundary conditions; the displacement of soil can be measured in different positions; and the deformation properties of interface layer can be studied under different temperatures

roughnesses and normal stresses. The results show that

the apparatus can accurately reproduce the mechanical and deformational behaviors of the interface layer between frozen soil and structure; meanwhile

it can provide a experimental basis for carrying out researches on the frozen soil-structure interface layer.