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在冻土帷幕平均温度计算中,控制参数的变化直接影响到计算结果。以单排管冻土帷幕温度场的巴霍尔金解析解为基础,使用近似积分和有限元模拟方法计算直线形单排管冻土帷幕的整体平均温度。针对基于巴霍尔金模型的平均温度计算公式中的冻结管外表面温度、冻结管间距及冻土帷幕边界到冻结管中心的距离与冻结管间距的比值3个参数对冻土帷幕整体平均温度影响的敏感性进行分析。得到以下结论:(1)冻土帷幕整体平均温度与冻结管外表面温度成正比;(2)在相同的偏差下,冻结管间距越小,对整体平均温度影响越大;(3)随着冻结发展,冻土帷幕厚度逐渐增大,其误差对整体平均温度计算的影响逐渐降低。
In the average temperature calculation of frozen soil curtain, the change of control parameters directly affects the calculation results. Based on the analytical solution of the Barholtzan of the temperature field of the single-row frozen soil curtain, the approximate integral and the finite element method are used to calculate the average temperature of the single-row frozen soil curtain. According to the average temperature calculation formula based on the Barholtz model, the freezing tube outer surface temperature, the spacing of frozen tubes and the ratio of the frozen soil curtain border to the center of the frozen tube to the spacing of the frozen tubes are calculated. The sensitivity of the impact is analyzed. The main conclusions are drawn as follows: (1) The overall average temperature of the frozen soil curtain is proportional to the temperature of the outer surface of the frozen tube; (2) The smaller the spacing of the frozen tubes, the greater the impact on the overall average temperature under the same deviation; (3) Frozen development, the thickness of the frozen soil curtain increases gradually, the error of the overall average temperature calculation gradually reduced.