Numerical Analysis of the Effect of Groundwater Seepage on the Active Freezing and Forced Thawing Temperature Fields of a New Tube–Screen Freezing Method

To more comprehensively explore the mechanism of active freezing and thawing process a new tube–curtain method in construction, temperature field is analyzed using finite element software to establish numerical model. Six paths were set up upstream downstream model around top steel tube analyze development frozen soil curtains during forced thawing. The results show that, due effect seepage, cold energy generated by pipe will be carried water, which leads asymmetry curtain. A greater seepage rate pronounced influence on field. During thawing, first 15 days curtain heating are fastest; thus, it necessary monitor settlement intensively this period. By comparing different heads water temperatures, was found that bigger head longer time. At constant higher shorter time, with time at 50 °C being about 0.5 times 5 °C. Low-temperature can chosen control cost; however, when large, high-temperature significantly shorten In addition, has little surrounding environment, along short construction period low cost, accordance concept sustainable development.