Measurement method and device for segregation freezing and swelling deformation field

The invention discloses a method and a device for measuring a segregation expansion deformation field, and belongs to the technical field of frozen soil measurement. A specific implementation mode of the method comprises the following steps: firstly, respectively acquiring all grey-scale maps of a frozen soil target area before and in a fractional congelation and expansion process to form a first grey-scale map sequence; wherein the grey-scale map has an acquisition time label; secondly, for any grey-scale map in the first grey-scale map sequence, performing image processing on the grey-scale map to obtain a quasi-analysis image; then, determining a reference time sequence based on a second grey-scale map sequence formed by the plurality of quasi-analysis images; and finally, on the basis of triggering of reference time in the reference time sequence, updating operation is executed on a reference image in the DIC analysis process of the second grey-scale map sequence, and a segregation freeze-expansion deform