The invention relates to a device for testing hydrothermal variation features of a hydrous
porous medium in a
freeze thawing process. The device is characterized in that a double-layer
system of internal and external model boxes is adopted, a
test sample and a variety of sensors are arranged in the
internal model box, the external model box mainly plays a heat preservation and
thermal insulation role, refrigerating coils arranged on the inner side wall and at the bottom of the external model box are communicated with two external cold baths to control the temperature and integrally heat and cool, and such liquid with low freezing points as
alcohol,
kerosene and ethanediol can be placed in the interlayer space of the internal and external model boxes to improve the
temperature control precision and the constant temperature effect. The device provided by the invention is mainly used for testing the hydrothermal variation feature parameters of the hydrous
porous medium in the
freeze thawing process, comprising temperature, volume unfrozen
water content, matric suction and the like, so that a
water feature curve of the hydrous
porous medium in the
freeze thawing process is drawn. The device provided by the invention has the advantages of simplicity in operation, stable work, high
temperature control precision, high overall heating and
cooling speed and the like, data are automatically collected by a
data collector, and then the hydrothermal variation feature parameters of the hydrous porous medium in the freeze thawing process are effectively tested and the
water feature curve is accurately obtained.