Test apparatus for pile-soil interface shear mechanical properties

A test apparatus for pile-soil interface shear mechanical properties, comprising:

• a support device (1), a pressure device (2), a membrane box (3), and a thrust device (4);
• wherein the support device comprises a bottom plate (1.1) a top plate (1.2), and a support beam (1.3), the bottom plate and the top plate being connected via a plurality of bracing struts (1.4), the support beam being disposed above the top plate;
• the pressure device is disposed on the support beam and arranged for applying a vertical pressure against a model pile (5), a membrane barrel (3.1) of the membrane box is vertically disposed on the bottom plate and sleeved at a radial outer side of the model pile, an accommodating cavity being provided between the membrane barrel and the model pile, the thrust device is sleeved on the membrane barrel and arranged for applying a plurality of horizontal thrusting forces against the membrane barrel so as to squeeze a model soil (6) in the membrane barrel along a direction perpendicular to an axial direction of the model pile, the plurality of horizontal thrusting forces incrementing linearly from top to down.