CAJ | 학술논문

　　从土颗粒的微观尺度认识和解释非饱和土的基本性质已成为土力学界日益关注的课题之一，将非饱和土作为湿颗粒材料来研究湿颗粒与液桥的相互作用更易认识其内在的微观水力特性。为研究一对不等径湿颗粒间形成液桥时表现的微观水力特性，用相应的光滑球体颗粒的间距描述颗粒表面的粗糙度，假定液桥的形状为圆环且不考虑颗粒重力和浮力的影响，提出了表征这对湿颗粒与液桥相互作用的理论模型。随后研究了液桥体积和毛细作用力与基质吸力、颗粒半径比、固-液接触角、颗粒表面粗糙度的无量纲关系，而且分析了干燥条件下颗粒间液体和液体蒸汽间的平衡关系。最后利用已有文献对球体颗粒间液桥的毛细作用力实测值验证了该模型在表征液桥毛细作用力与颗粒间距关系时的有效性。
　　종토과립적미관척도인식화해석비포화토적기본성질이성위토역학계일익관주적과제지일，장비포화토작위습과립재료래연구습과립여액교적상호작용경역인식기내재적미관수력특성。위연구일대불등경습과립간형성액교시표현적미관수력특성，용상응적광활구체과립적간거묘술과립표면적조조도，가정액교적형상위원배차불고필과립중력화부력적영향，제출료표정저대습과립여액교상호작용적이론모형。수후연구료액교체적화모세작용력여기질흡력、과립반경비、고-액접촉각、과립표면조조도적무량강관계，이차분석료간조조건하과립간액체화액체증기간적평형관계。최후이용이유문헌대구체과립간액교적모세작용력실측치험증료해모형재표정액교모세작용력여과립간거관계시적유효성。
Soil particle-level investigation of basic behavior for unsaturated soil is increasingly concerned by soil mechanics researchers. It seems easier to recognize microscopic hydraulic behavior of wet particulate material such as unsaturated soil by analyzing the interaction between wet particles and liquid bridge. A the-oretical model for the interaction between uneven-sized wet particles and liquid bridge is proposed, consist-ing of an assumed toroid-shaped liquid bridge in contact with corresponding smooth particles, at a separa-tion determined by their actual surface roughness. The volume and capillary force of the liquid bridge be-tween them are related to matric suction, ratio of particle radius, solid-liquid contact angles, and rough-ness of the particles. In addition, equilibrium between liquid and liquid vapor is also analyzed. Finally, the model can be in good accordance with the test data of capillary force versus particle separation in the past literature.