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冻土帷幕平均温度是人工地层冻结工程设计、施工和安全管理的重要参数.为了确定单排管冻土帷幕的平均温度,进而确定冻土的力学参数和冻土帷幕的承载能力,为冻土帷幕的安全状态作出评价.以单排管冻土帷幕温度场的巴霍尔金解析解为基础,建立了直线形单排管冻土帷幕的平均温度的两种计算模型——等效梯形法和等效三角形法模型,该模型以冻土帷幕某一横截面厚度上的等效梯形法或等效三角形法计算的平均温度来等效整体冻土帷幕的平均温度.在实际工程中可能出现的冻结管平面布置参数变化范围中,全面考察了冻土帷幕平均温度等效梯形法和等效三角形法计算结果与依据巴霍尔金解析解数值积分计算结果的误差.结果表明,等效梯形法和等效三角形法计算的冻土帷幕平均温度误差很小,优于流行的计算方法.
The average temperature of the frozen soil curtain is an important parameter in the design, construction and safety management of artificial frozen ground.In order to determine the average temperature of the single-row frozen soil curtain and then to determine the mechanical parameters of frozen soil and the bearing capacity of the frozen soil curtain, The security state of the curtain is evaluated.On the basis of the analytical solution of the Bahuirin gold of the temperature field of the single row of frozen soil curtain, two calculation models of the average temperature of the single row of frozen soil curtain are established - equivalent trapezoidal method And the equivalent triangulation method which equates the average temperature of the whole frozen soil curtain with the average temperature calculated by the equivalent trapezoidal method or the equivalent triangle method of the thickness of a certain frozen soil curtain.It may occur in practical engineering , The errors of the calculation results of equivalent trapezoid method and equivalent triangle method of the average temperature of the frozen soil curtain and the numerical integral calculation based on the analytical solution of the Barholtzan method are comprehensively investigated.The results show that the equivalent trapezoid The average temperature error of the frozen soil curtain calculated by the method of law and the equivalent triangle is small, better than the popular method of calculation.