Instrument for observing delamination frost-heave amount of in-situ soil

The utility model discloses an instrument for observing delamination frost-heave amount of in-situ soil. The instrument is structurally characterized in that the instrument comprises frost heave observation tubes, a reference stake upright stanchion, a top protecting sleeve, a frost-heave amount observation scale, bearing rings and water stopping rings; the reference stake upright stanchion is connected with a bearing plate at the bottom; the frost-heave amount observation scale is fixed at the top of the reference stake upright stanchion; the protecting sleeve covers the top end of the frost-heave amount observation scale; the frost heave observation tubes, which are below the frost-heave amount observation scale and are of different diameters and different heights, are arranged at the periphery of the reference stake upright stanchion; and the bearing rings are connected to the outer walls of the bottom of the frost heave observation tubes, and the water stopping rings are arranged on the inner walls. The instrument has the advantages of simplicity in operation, small occupied area and lower construction cost; and the manner of variable pore diameters and the bearing rings, the observation result can accurately reflect the frost heave deflection of corresponding depths.