高流速地下水流地层冻结壁形成的研究

高流速地下水流地层冻结壁形成的研究 English Version

基金项目: 煤炭科学基金!资助项目 (97建 1 0 70 4 );;南京林业大学校引进人才基金!资助项目 (2 0 0 0 - 0 50 1Y)

1.Civil Engineering College Nanjing Forestry University Nanjing 210037 China 2.Department of Applied Mechanics China Sciences and Technology University Hefei 230026 China

摘要: 利用多孔介质热运移理论及达西模拟建立的考虑地下水流时冻结峰面发展的数学模型 ,采用数值计算法 ,分析了冻结过程中温度场及地下水流场的变化规律 ;获得了冻结孔布置间距极限值与地下水流速、饱和砂原始温度、冻结管外表面温度、冻结管管径及未冻饱和砂导热系数间的定量关系 ;干密度、含水率与比热不影响冻结孔布置间距极限值大小 ,但影响冻结壁发展快慢。
- 地下水流速 /
- 冻结壁 /
- 温度 /
- 多孔介质 /
- 数值计算
Abstract: Established the mathematical model of development of frozen wall considering the groundwater flow with theory of thermal transport in porous media and Darcy flow model. The variation of the temperature field and the flow field was analyzed by the numerical calculation. Obtained the quantitative relation of the limited space of freezing pipes with the flowing velocity,the initial temperature,the surface temperature of freezing pipes,the radius of freezing pipes and the thermal conductivity of the unfrozen region.The dry density,the water content and the specific heat didn’t effect the limited space of freezing pipes, but affected frozen wall proceeding velocity.
- velocity of groundwater flow /
- frozen wall /
- temperature /
- porous media /
- numerical calculation