Study On Theory And Test Of Tunnel Construction By Artificial Horizontal Freezing Method

Soil frost heave displacement and the distribution of temperature field has been the most critical issues in the freezing engineering since the artificial freezing construction method was applied in civil engineering. Soil frost heave is directly related to the safety and success of the actual project. The research of temperature field is provided the most important basis for freezing engineering design and application.In this paper, the artificial freezing method of connecting passage in shanghai subway tunnel was designed, and describes the construction method and technology; Using finite element software to simulate the freezing soil temperature field in three dimensions, and get the distribution of freezing soil temperature field and values. Using sequential coupling to simulate and obtain the distribution of freezing soil displacement field. Using the results of the numerical simulation test the feasibility of the freeze design scheme; At last compared the measured data with the results of numerical simulation and analysis of the results. The numerical simulation consistent with real situation and prove the reliability of the simulation method.It provides a reference for design and construction of similar projects in the future by the research of design methods and frost heave of soil displacement field and temperature field. This study has practical guiding significance.