摘要
利用颗粒流(PFC)方法建立了土工织物PFC反滤模型,从细观层面分析了具有土工织物反滤结构的土体中水流挟持颗粒移动的特点及影响因素,探讨了PFC方法应用中引发的误差问题,并提出了解决方案。通过正交试验法分析了多因素影响下土工织物颗粒流反滤模型的孔隙率变化敏感性,进一步验证了土工织物淤堵试验中出现的渗透系数"峰值"现象及其产生的原因。
Particle flow code （PFC） method is used to establish the geotextile filter numerical model. And the particles moving characteristic and influencing factors hostaged by water in soil with geotextile filtration structure is analyzed from micromechanics level. The calculation errors of PFC application in numerical simulation of geotextile filter is discussed and the solution method is put forward. Under the influence of multi-factors, the porosity sensitivity of the geotextile particles flow filtration model is analyzed by using orthogonal test. Finally, it further verifies the permeability coeffi cient ＂peak＂ phenomenon in geotextile clogging test and its causes.
出处
《水电能源科学》
北大核心
2013年第4期106-110,共5页
Water Resources and Power
基金
国家自然科学基金资助重点项目(40930635)
江苏省水利厅科技创新基金资助项目(2009022)
关键词
颗粒流方法
土工织物
反滤
数值模拟
细观
particle flow code
geotextile
filter
numerical simulation
micromeehanics
