In the construction of artificial freezing methods and cold region engineering, the determination of the accurate temperature field is the demand of both ensuring the stability of frozen soil and reducing the project investment. Affected by the external environment, phase change latent heat, non-linear thermal parameters, etc., the temperature evolution of the soil freezing process is a non-linear form, and the temperature field evolution will be more complex with the change of different influencing factors. Scientific control and utilization of the influencing factors of the frozen soil temperature field play a vital role in improving the freezing efficiency and accuracy of the soil temperature field. This study aims to analyze the sensitivity of thermal factors on the nonlinear formation process of frozen soil temperature field, and to provide the results for the control of various factors in frozen soil engineering. A freezing model test was designed and implemented, the boundary conditions and temperature evolution in the model were monitored. Meanwhile, the thermal parameters and unfrozen water content of the model soil were tested indoor. Then the theoretical relationship between unfrozen water content and parameters was deduced to determine the variation range of unfrozen water content. The boundary condition values (including the maximum, minimum and average values) and thermal parameters were used in the orthogonal simulation of the freezing model, respectively. The temperature simulation values were compared with the model test values, and the factors affecting the nonlinear heat transfer of frozen soils were analyzed quantitatively by both the range method and variance analysis method. Several suggestions of the vital factors in the soil freezing construction were offered based on this research.

在人工冻结方法和寒区工程建设中，准确确定温度场是保证冻土稳定性和减少工程投资的需要。受外界环境、相变潜热、非线性热参数等影响，土壤冻结过程的温度演化为非线性形式，温度场演化会随着不同影响因素的变化而更加复杂。因素。科学控制和利用冻土温度场的影响因素，对提高冻土温度场的冻结效率和精度起着至关重要的作用。本研究旨在分析热因素对冻土温度场非线性形成过程的敏感性，并为冻土工程中各因素的控制提供结果。设计并实施了冻结模型试验，监测了模型中的边界条件和温度演变。同时，在室内对模型土的热学参数和未冻水含量进行了测试。然后推导出未冻水含量与参数之间的理论关系，确定未冻水含量的变化范围。边界条件值（包括最大值、最小值和平均值）和热参数分别用于冷冻模型的正交模拟。将温度模拟值与模型试验值进行比较，采用极差法和方差分析法定量分析了影响冻土非线性传热的因素。在此研究的基础上，对土壤冻结施工中的关键因素提出了几点建议。