摘要
充填管袋是由充填砂及土工织物共同组成的非均质结构,其渗透特性受到充填砂与土工织物的共同影响。为探究土工织物覆砂系统的渗透特性,利用不同颗粒级配的充填砂料分别在有、无土工织物覆砂条件下的渗透试验,分析了颗粒级配对纯砂及土工织物覆砂系统渗透系数的影响,并对比同级配充填砂渗透系数分析了土工织物的影响。试验结果表明:在有、无土工织物覆砂条件下,单一粒径含量变化对其渗透系数的影响规律一致:粉、细、中、粗粒的含量均与其各自的渗透系数成线性关系,其中粉、细、中粒的含量与渗透系数呈负相关,粗粒含量与渗透系数呈正相关;而土工织物覆砂系统的渗透系数均小于同级配纯砂的渗透系数;最终,选择参数d_(50)^(2)(C_(c)/C_(u))作为代表颗粒级配的变量分别拟合得到了纯砂及土工织物覆砂系统渗透系数的经验公式,供实际工程参考。
Geotube is a heterogeneous structure composed of fillings sand and bag materials,and its permeability is affected by filling sand and geotextile.To explore the permeability characteristics of sand covered with geotextile,the permeability tests of filling sand with different particle grading under the condition of sand covered with or without geotextile are carried out.The influence of particle grading on permeability coefficient of filling sand and sand covered with geotextile are explored.And the influence of geotextile on permeability coefficient is analyzed by comparing permeability coefficient of sand covered with and without geotextile.The test results show that the influence of single particle size content is linearly related to their respective permeability coefficients under the condition of sand covered with or without geotextile.But under the same grading conditions,the permeability coefficient of sand covered with geotextile is smaller than that of pure sand.Finally,the empirical formula of permeability coefficient of filling sand and sand covered with geotextile are fitted with a new parameter d_(50)^(2)(C_(c)/C_(u)).
作者
满晓磊
鲍永健
吴海民
刘广英
MAN Xiao-lei;BAO Yong-jian;WU Hai-min;LIU Guang-ying(College of Civil and Architectural Engineering,Chuzhou University,Chuzhou 239000,Anhui Province,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)
出处
《中国农村水利水电》
北大核心
2022年第7期175-179,192,共6页
China Rural Water and Hydropower
基金
国家自然科学基金面上项目(51978472)
安徽省高校自然科学重点项目(KJ2019A0640)
2020年大学生创新创业训练计划项目(2020CXCL136)。
关键词
充填管袋
充填砂
颗粒级配
土工织物
渗透系数
geotube
filling sand
particle grading
geotextile
permeability coefficient
