Experimental Study on Permeability Characteristics of Geotubes for Seepage Analysis on Safety Assessment of Dams

作     者：Xiaolei Man Ganggang Sha Shuigen Hu Hui Bao Guangying Liu 

作者机构：School of Civil and Architectural EngineeringChuzhou UniversityChuzhou239000China College of Mechanics and MaterialsHohai UniversityNanjing210098China 

出 版 物：《Structural Durability & Health Monitoring》 (结构耐久性与健康监测（英文）)

年 卷 期：2020年第14卷第4期

页      面：339-353页

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：The author(s)received funding for this study from Key Research Project of Natural Science in Colleges and Universities of Anhui Province(KJ2019A0640)and(KJ2018B09) 

主　　题：Geotextile flling sand permeability cofficient geotube dam seepage analysis safety assessment 

摘      要：Geotubes are heterogeneous structures composed of filling sand and bag material,and its pemeability characteristics are different from that of flling *** uncertainty of geotubes permeability characteristics results in the failure of seepage analysis of geotube dams,which restricts the safety assessment of the *** the basis of the study on the seepage mechanism of the geotubes,the influence of particle grading on pemeability cofficient of flling sand and sand covered with geotextiles were explored by the pemmeability tests of flling sand with different particle grading under the condition of sand covered with or without *** the infuence of geotextiles on the permeability coefficient was analyzed by comparing permeability coefficient of sand covered with and without *** test results show that the influence of single particle size content on permeability coe ficient is consistent under the condition of sand covered with and without *** content of powder,fine,medium and coarse particles is linearly related to their respective permeability *** the content of powder,fine,medium particles is negatively correlated with their permeability coefficients,while the content of coarse particles is positively correlated with the permeability *** the pemeability coefficient of sand covered with geotextiles is smaller than that of flling sand under the same ***,the parameter d2 50 Cc/Cu was selected as a variable representing the particle grading to fit the empirical formula of permeability coefficient of flling sand and sand covered with geotextiles.