摘要
管涌对堤防和大坝的危害严重而常见,目前对非均匀砂土管涌发生机理以及颗粒流失规律的研究不够深入.通过室内渗透试验,在特定条件下,从测压管水位变化、渗透系数、细颗粒运动趋势、累计涌砂量以及平均涌砂速率等方面来研究非均匀砂土的管涌发生与发展规律.揭示了试样内部细颗粒运动趋势以及渗透系数变化规律.
It is well know that piping has serious hazards to embankments and dams,but the study on the mechanismof piping and the emission of fine particles of mixed sand is not deep enough. By means of laboratory permeabilitytest,under particular testing conditions,changes of piezometric heads,coefficients of permeability,tread of fineparticles in samples and cumulative amount of sand are analysed to study the law of initiation and development ofpiping. The moving trend of fine particles in the sample and the variation of permeability coefficients are revealed.
出处
《河南科学》
2015年第11期1967-1972,共6页
Henan Science
基金
江苏省博士后资助基金项目(1402012A)
水利部土石坝破坏机理与防控技术重点实验室开放基金(YK913006)
江苏省自然科学基金(BK20151495)
关键词
非均匀砂土
管涌
渗透系数
涌砂量
nonuniform sand
piping
coefficient of permeability
amount of accumulated sand
