考虑土层冻结温度时人工冻结温度场模型

Models of Artificial Frozen Temperature Field Considering Soil Freezing Point

为了研究土层冻结温度对冻结壁厚度计算的影响,构建了考虑土层实际冻结温度的人工冻结温度场模型.对前苏联学者关于人工冻结温度场的若干经典解析解,如特鲁巴克单管和单排管解、巴霍尔金单排和双排管解,做出了修正.推导出了全面反映确定温度场下冻结壁厚度与土层冻结温度之间关系的修正解.结果表明:冻结壁厚度随土层冻结温度的降低而减小.当冻结温度为-1^-2.5℃时的冻结壁厚度比按冻结温度假设0℃时的计算值可减薄10%~23%.土层冻结温度对冻结壁厚度的影响不容忽视.

In order to study the effect of the soil freezing point on the calculation of frozen wall thickness, some models of the artificial ground freezing temperature field were established. Based on the modification of some classical analytic solutions of artificial ground freezing temperature field, such as the solutions for single-pipe freezing, single-row-pipe freezing and the double-row-pipe freezing, presented by the former USSR scholars, the modified solutions which can fully describe the relationship between the frozen wall thickness and the soil freezing point were deduced. The results show that the frozen wall thickness decreases as the soil freezing point decreases. The thickness with the freezing point range of -1 ℃ to -5 ℃ can be reduced by 10%-23% than that when the freezing point is assumed as 0 ℃. The soil freezing point should never be neglected when calculating the frozen wall thickness.