Study on the Change Rule of Temperature Field of X-shaped Freezing Tube

To improve the freezing ability of single pipe of existing freezing pipe for the situation of circulation refrigerant medium dosage and construction power consumption.The traditional circular section of freezing pipe may be designed into special-shaped ones.The paper briefly introduces the freezing pipe with X-shaped section and made the study on the change rule of temperature field while freezing pipe with X-shaped section being frozen by finite element software.At the same time, by the comparative analysis on the temperature fields of circular-shaped, square-shaped, I-shaped, T-shaped and Y-shaped single pipes, the conclusion was drawn that although the sections of X-shaped and other shapes of freezing pipes are noncircular, the temperature of frozen soil is concentric mode distribution with freezing pipe as the center, the nearer to the freezing pipe is, the lower the temperature.While being frozen 20, 30 and 40 days, the radius of -10℃ circular frozen wall were to 200mm, 240mm and 300mm respectively around X-shaped freezing pipe.Compared with circular freezing pipe, the special-shaped ones have advantages of greatly reducing construction electricity comsumption.