Finite Element Numerical Simulation Of Freezing Method In Construction Process

With the rapid expansion of cities in our country,urban traffic congestion is becoming more and more prominent.In order to solve this problem,many domestic cities presented a subway construction.But due to the special working conditions,the construction of connecting passage often face huge risk.As new materials,new technology,new methods are introduced in geotechnical reinforcement this ancient topic.Freezing method for construction simple,light chemical pollution,and the advantages of strong adaptability,good water insulation,gradually become a connecting passage construction method of choice,gradually become a connecting passage construction method of first choice.Predictably,during the construction of underground engineering,the artificial freezing method has broad application prospects.In this paper,through the establishment of finite element model of complex under the condition of freezing temperature field and stress field numerical simulation and analysis,The main research contents include:(1)Application of thermodynamics and solid mechanics principle,the twodimensional finite element method(fem)simulation the formation process of horizontal freezing tube single pipe temperature field,In Zhengzhou city rail transit line 5 engineering the meaning between Zhongyi station and CBD station undisturbed soil as an object,studied the temperature field of freezing method construction process.(2)Using finite element method to simulate the double pipe freezing temperature field changes,and the research on the rules of temperature field of freezing,to provide theoretical reference for the construction of the practical engineering.(3)The finite element method(fem)simulation freeze supporting for the excavation of tunnel under stress field change.By defining the DP material freezing supporting model is established In order to introduce the temperature field,first make soil freezing to design the thickness of frozen wall.The connecting passage around 2.0 m within the scope of the material parameters of soil change become the material parameters of frozen soil,then the numerical calculation...