应力作用下三种典型渗流曲线及机理分析  

Three Typical Seepage Curves under Stresses and Their Mechanism Analysis

作　　者：唐红侠[1] 周志芳[2] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092 [2]河海大学土木工程学院,南京210098

出　　处：《高校地质学报》2008年第3期455-458,共4页Geological Journal of China Universities

基　　金：国家自然科学重点基金(50239070)资助

摘　　要：基于不同压力作用下的裂隙渗流试验获得的三种典型的渗流曲线类型,给出了应力作用下影响试样渗透性的主要原因:在正应力作用下裂隙发生变形;在剪应力作用下裂隙可能发生劈裂及扩张。通过分析裂隙变形和劈裂、扩张过程中裂隙渗透性的变化,阐述了在应力作用下,看似异常实则正常的三种典型的渗流曲线类型的机理:在其它条件相同的情况下,试样的渗透性与应力的关系取决于应力与裂隙间的夹角。Three typical seepage curves are obtained using fractured seepage tests based on diffirent pressures. The main factors affecting the sample permeability are discussed. The fractures would be deformed under the condition of positive stress and be ruptured and extended under the condition of shear stress. The permeability variation of fractures is also analyzed during fracture deformation, rupturing and extension. The mechanisms of three typical seepage curves, which seem to abnormal but actually normal, are explained under the condition of stress. At the same other conditions, the relationship between permeability and stress of samples is determined by the angles between stresses and fractures.

关 键 词：裂隙 变形 劈裂 渗流 机理 

分 类 号：P642[天文地球—工程地质学]