考虑未冻水单管冻结温度场解析解  

Analytical solution for temperature field around a single freezing pipe considering unfrozen water

作　　者：周扬[1,2] 周国庆[1,2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学力学与建筑工程学院,江苏徐州221116

出　　处：《煤炭学报》2012年第10期1649-1653,共5页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(50534040);中国博士后基金面上资助项目(2011M500969);中国矿业大学青年科研基金资助项目(2009A007)

摘　　要：针对冻结法应用中的单管冻结问题,考虑土体在冻结状态下存在随负温连续变化的未冻水,通过将土中水随负温降低而连续冻结的过程离散化,建立了单管冻结温度场变化的离散相变模型,并给出了模型的解析计算方法。将解析解答与连续相变模型下的数值解进行了对比,验证了该解答的正确性。利用解析解,分析了土体冻结状态下存在的未冻水对冻结锋面推进过程的影响,结果表明:忽略未冻水将低估土中冻结锋面的推进速度,并且其低估程度随土体比表面积的增加而增大。For the freezing process induced by single freezing pipe during the application of artificial ground freezing technique,the continuous phase change of the soil water with the decreasing soil temperature was considered.A discrete phase change model of the temperature field was established after the continuous phase change of soil water was discretized.An analytical solution for the model was presented.The solution was verified with the numerical results of the continuous phase change model.The effect of unfrozen water in the frozen soil was studied.And the results indicate that neglecting the unfrozen water can underestimate the moving velocity of the freezing front,and this effect increases with the soil specific surface increasing.

关 键 词：未冻水 单冻结管 温度场 解析解 

分 类 号：TD265.3[矿业工程—矿井建设]