Numerical Simulation And Heat Conductivity Identification Of Deep Earth Freezing Temperature Field

This article associates the numerical simulation and theoretical analysis, based on the related knowledge of temperature field of deep earth freezing method, combined with parameter identification methods, simulates the deep freezing temperature field by ANSYS finite elements and researches its equivalent average heat conductivity by back-analysis. This article analyses the application conditions of freezing method, current research status and the problems in this (?)iold. It, points that it' s necessary to study deep freezing temperature field deeply and discusses the factors which influence the freezing wall such as soil' s nature, moisture content, geological conditions, etc. It introduces the theory, process of freezing method, the distribution of temperature field of freezing method and key thermotics parameters influencing freezing temperature field, it simplifies the deep freezing temperature field model. Through ANSYS, this article founds the deep freezing temperature field model, and simulates the field on vary heat conductivities. It analyzes the results of ANSYS simulation, gains the theoretical value of thermometric holes which is needed by back analysis. Using the simulation temperature and actual value, it gets the equivalent heat conductivity. Then it solves the deep freezing temperature field by the equivalent value, simulates the freezing wall development process and temperature change curve. Against the actual project, the results are favorable.