Abstract:

The thermal limiting pipes are used to lay restrains on the development of frozen soil curtain. The influencing rules of thermal limiting pipe on development of frozen soil curtain are analyzed by means of finiteelement method. The conclusions are drawn as follows: 1) The frozen soil curtain thickness decreases linearly as the water temperature of thermal limiting pipe increases. 2) A more even boundary of the frozen soil curtain can be obtained under a higher temperature of the water of thermal limiting pipes. 3) The thermal limiting pipes should be aligned perpendicularly to the freezing pipes. 4) The distance between thermal limiting pipe and freezing pipe is controlled by the thickness of frozen soil curtain. 5) The temperature of thermal limiting pipes is recommended to be 5-10 ℃.

Key words: thermal limiting pipe, frozen soil curtain, temperature field, ground freezing method, heaving thaw settlement, numerical simulation