Frozen soil frost heave experiment device and frozen soil frost heave measuring method

The invention relates to a frozen soil frost heave experiment device and a frozen soil frost heave measuring method. The frozen soil frost heave experiment device comprises an accommodating cavity and a displacement collector, wherein the accommodating cavity is used for accommodating an experimental soil body, the upper part of the accommodating cavity is opened, and the side wall and the bottom wall of the accommodating cavity are heat-insulating; the displacement collector is in contact with the top surface of the experimental soil body, the accommodating cavity is composed of the bottom wall and a plurality of rigid thermal insulation type ring bodies superimposed on the bottom wall in the axial direction, and when frost heave occurs on the experimental soil body, the ring bodies can axially and freely move along the accommodating cavity so as to be partitioned out mutually. Through the frozen soil frost heave experiment device, the frost-heave capacity of the experimental soil body can be accurately measured in a laboratory.