岩土工程学报2012，Vol.34Issue(8)：1432-1439,8.
无黏性土管涌出砂与渗透性非均匀发展试验研究
Piping and non-uniform permeability development of cohesionless soils
摘要
Abstract
It is well known that the piping effect has serious hazards to embankments and dams, but the study on the emission of fine particles of soil and on the development of non-uniform penetration of soil foundation after the piping effect is not deep enough. Since the development of piping effect is random and complex, by means of a self-designed equipment, under particular testing conditions, 12 samples with three different pore size distributions are used to make a comparative analysis from the aspects such as piezometric head, flow, coefficient of permeability, trend of fine particles and cumulative amount of sand. Furthermore the coefficient of permeability, void ratio, movement trend of the fine particles in samples and the change law of content of the remaining fine particles are studied. Combined with theoretical calculations, the movement trend of the fine particles in the samples, the non-uniform correlation between the content of the remaining fine particles and the permeability change can be revealed. By using the relationship between permeability and porosity, a theoretical formula can be deduced from the changing amount of accumulated sand over time under the fixed upper head.关键词
管涌/无黏性土/涌砂量/渗透系数Key words
piping/cohesionless soils/amount of accumulated sand/coefficient of permeability分类
建筑与水利引用本文复制引用
陈亮,张红宇,雷文,梁越,季纯波,王晨龙..无黏性土管涌出砂与渗透性非均匀发展试验研究[J].岩土工程学报,2012,34(8):1432-1439,8.基金项目
国家重点基础研究发展规划（973计划）项目 （）
河海大学中央高校基本科研业务费项目 （）
