修正的土体等温水分扩散系数求解方法探讨  

Discussion on the improved method for solving isothermal moisture diffusion coefficient of soil

作　　者：谈云志[1] 刘晓玲[1] 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002

出　　处：《合肥工业大学学报（自然科学版）》2010年第7期1042-1044,共3页Journal of Hefei University of Technology：Natural Science

基　　金：西部交通科技资助项目(200631878530);三峡大学人才启动基金资助项目(0620090035)

摘　　要：文章通过分析地下水对路基土体的毛细作用现象,得出地下水在路基土体的迁移过程不能忽略重力的影响;在水平吸渗试验与饱和渗透试验方法基础上,推导了考虑重力影响的等温水分扩散系数求解公式;最后,利用自制的试验仪器做了3组不同干密度试样毛细上升试验,并利用上述方法求解了其扩散系数。Based on the analysis of the capillary phenomenon of groundwater in the subgrade,this paper concludes that the gravity effects should not be ignored during the groundwater migration process in the subgrade.By the level infiltration test and permeability test methods,an isothermal moisture diffusion coefficient formula in consideration of gravity is derived.The paper also carries out capillary rise tests with three different dry density samples by using self-made apparatus,and their diffusion coefficient is solved through the present method.

关 键 词：等温扩散系数 毛细上升 水平入渗 非饱和渗透系数 

分 类 号：TU446[建筑科学—岩土工程]