岩石裂隙毛管压力-饱和度关系曲线的试验研究  

Laboratory Experimental Study of Capillary Pressure-Saturation Relationships for Rock Fracture

作　　者：叶自桐[1] 韩冰[1] 杨金忠[1] 周创兵 

机构地区：[1]武汉水利电力大学水利系

出　　处：《水科学进展》1998年第2期112-117,共6页Advances in Water Science

基　　金：国家自然科学基金

摘　　要：介绍了三峡花岗岩体裂隙毛管压力－饱和度试验。试验采用互不溶混驱替法。试验结果表明，在渗流基本特征方面，裂隙非饱和渗流毛管压力－饱和度关系曲线与空隙介质水分特征曲线具有相似性，如毛管压力－饱和度关系曲线的滞后现象；湿润流体（水）的排泄曲线具有进气压和束缚水饱和度；非湿润流体的吸湿曲线具有残余饱和度。这种相似性表明，孔隙介质非饱和渗流的研究成果可用于裂隙非饱和渗流，孔隙介质水分特征曲线的解析模型，可用于研究裂隙毛管压力－饱和度关系曲线和拟合毛管压力－饱和度排泄曲线的试验数据。A laboratory measurement of capillary pressure-saturation curves for granite sample got at construction site of the Three Gorges Project is introduced in this paper. The method of immiscible displacement is adopted in the experiment. The data measured show that some analogies exit between the capillary pressure saturation curves for unsteady flow in fracture and in parous media, that is hysteresis phenomena in the capillary pressure saturation ralationship, drainage curve of wetting phase show bubbling pressure, and irreducible water saturation; residual saturation for imbibition curve. The analogies show feasible that the research achievements and mathematical models of characteristics of unsteady flow in porous media can be used in studies of unsteady flow in fractures.

关 键 词：岩石裂隙 毛管压力 饱和度 试验 

分 类 号：TU45[建筑科学—岩土工程] P641.135[建筑科学—土工工程]