水平冻结法温度场数值模拟

摘要

以天河客运站折返线暗挖隧道为背景，分析三维温度场同二维温度场区别及冻结壁厚度的发展趋势，通过 ANSYS对冻结区域的温度场进行数值模拟，对冻结区域进行温度的定量评价，并分析了各个冻结时间段的温度场分布、冻结壁厚度。对数值模拟模型的建立进行了优化设计，对数值模拟计算的单元点划分粗细部位也进行了优化，从而建立贴近实际的模型，提高计算精度，给实际的设计和施工提供可靠的温度数据。%In this paper,based on the background of Tianhe Bus Station turn-back line mined tunnel, the difference between the three-dimensional temperature field and two-dimensional temperature field and the development trend of thickness of the freezing wall are analyzed.The temperature field at fro-zen zone is simulated by ANSYS software to quantitatively evaluate the frozen zone temperature and analyze the temperature distribution and the thickness of freezing wall at each frozen time segment. The optimization of simulation model and unit division precision are performed to obtain more accurate model and better precision.It provides reliable temperature data for actual design and construction.