摘要
非饱和土体中的部分气体极容易在入渗过程中被封闭在孔隙或裂隙中,形成互不连通的与外界隔绝的封闭气泡.封闭气泡的存在阻碍了水相的流动,使土体的渗透性能降低,从而对土体的入渗速率产生不可忽视的影响.通过阅读相关文献,分析总结了前人的研究成果,从封闭气泡对渗透性影响的相关试验研究以及数值模型等方面,介绍了目前国内外关于封闭气泡的研究进展情况,指出了目前有待解决的问题.
A part of the volume of siol air is easily surrounded by water flow and entrapped in the pores of soil in the infiltration progress. The entrapped air is not continuous with each other or the external atmosphere;thus the water flow is encumbered and the permeability is decreased; so as to result in nonnegligible influence on infiltration. Based on collecting the previous references, the review on entrapped air phenomenon, the experimental study and numerical model of its effects on soil permeability and infiltration rate is presented. Fi- nally, the unsolved problem is proposed; this research could provide information to the researchers and engineering staff.
出处
《三峡大学学报（自然科学版）》
CAS
2009年第4期52-56,共5页
Journal of China Three Gorges University：Natural Sciences
关键词
封闭气泡
土壤渗透性
入渗率
entrapped air
soil permeability
infiltration rate
