Test Research on Frost Heave by Artificial Freezing with Different Freezing Directions

Under artificial freezing conditions,including different freezing directions,as well as the constant and sine varying freezing temperature models,the frost heave was studied.The effects of temperature field,frost-heave amount,water content and dry density on the frost heave were analyzed.The test results indicated that the frost heave amount of the top-bottom sine freezing sample was the least and that of the bottom-top constant freezing sample was the most,under the same experimental conditions.The distribution laws of water ratio and dry density of the top-bottom constant/sine-temperature and bottom-top constant-temperature artificial freezing samples were the same,which demonstrated that the water migration rules were similar with the same freezing power from cooling side under the same experimental conditions.