摘要
对压力作用下的部分堵塞无纺织物进行了室内试验,表明有土颗粒进入的织物压缩性和渗透性都降低,提出织物滤层的等效孔径折减系数RF,并建议用于贴坡排水时RF取1.5～2.5。织物无堵塞压力条件下,Giroud(1996年)提出的公式对织物渗透系数有满意的预测值。在压力作用下对比分析了部分堵塞织物Giroud法和等效孔隙率法的渗透系数预测值,也与实测渗透系数值进行了比较,表明提出的等效孔隙率法能较好地预测渗透系数。
A laboratory test program was conducted on partially clogged nonwoven geotextiles under pressure. The results of test showed that the presence of soil particles inside the geotextile reduced its compressibility and permittivity, a reduction factor （RF） of equivalent opening size was proposed during filtration. RF of 1.5--2.5 was suggested for the drainage of bank slope. The expression presented by Giroud （1996） demonstrated a satisfactory forecast of coefficient of permeability of non-clogged geotextiles under pressure. Comparison of measured and predicted permeability values for partially clogged geotextile specimens indicated that an expression of equivalent porosity has a better prediction of soil impregnated specimens under pressure.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第11期3128-3132,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.50479005)
关键词
压力
部分堵塞
折减系数
等效孔隙率
pressure
partially clogged
reduction factor
equivalent porosity
