Abstract: The recent deep excavation projects present the characteristics of deeper depth, larger area and more complicated geological conditions with an increasing utilization of underground space and the construction of major projects. Owing to the characteristics of temporary support, groundwater stops and groundwater cut-off, wide application range and minimal pollution, the artificial freezing method has received an increasing in the excavation supporting projects. The application status of the artificial freezing method in foundation pit engineering were summarized in this paper, and the research of freezing parameters, temperature field, frost heaving force and deformation characteristics were also discussed comprehensively in this paper. Problems existed in the application of artificial freezing method in deep excavation projects were investigated. It is concluded that the limitations of the analytical theory and model, the intense heat exchange in the excavated area, the ambiguity of interface mechanism and influence range, and the imperfection of relevant standards are the main reasons that might impede the application of the artificial freezing method in excavation supporting projects. This paper presents that the future development trends are the in-depth study of the design theories, the establishment of the standard system and the information management during the entire construction process.

Key words: Freezing Method, Deep Foundation, Frozen Wall, Frost Heaving Force, Deformation, Prospect