Prevent eccentric pressurized strain control formula direct shear test appearance of soil sample

The utility model discloses a prevent eccentric pressurized strain control formula direct shear test appearance of soil sample, it includes that shear box, vertical pressure apply the device, device,instrument table and instrument table seat are applyed to horizontal pressure, shear box comprises last shear box and lower shear box, the instrument table seat has the restriction and goes up the limit structure that shear box removed along the horizontal pushing force direction and inject down the track that shear box removed on the pedestal surface along the horizontal pushing force direction,vertical pressure applys the part including the lever that pressurizes perpendicularly, weight, perpendicular increased pressure frame, pressure rod and biography gland, horizontal pressure is applyedthe device and is included impeller and steel loop, and shear box slides along the track under promoting when the impeller is promoted by external force, and the thrust bearing is unanimous with track direction. The utility mo