Page 134 - 《水资源与水工程学报》2022年第1期
P. 134
!33 " ! 1 # & ' ( ) & * + , - Vol.33No.1
2022 $ 2 % JournalofWaterResources&WaterEngineering Feb.,2022
DOI:10.11705/j.issn.1672-643X.2022.01.18
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BCDEF:TV41;TV32 GHIJK:A GLMF:1672643X(2022)01013006
Experimentalstudyoninterfacefrictioncharacteristicsof
compositegeomembrane -cushion
2
1
2
1
2
2
YANGWu,LIULiang,WUYuanpeng,LIYayun,ZHANGFengchao,LIWenhao
(1.CollegeofHydraulicandCivilEngineering,XinjiangAgriculturalUniversity,Urumqi830052,China;
2.XinjiangXingnongBuildingMaterialsTestingCo.,Ltd.,Urumqi830052,China)
Abstract:Theinterfacialfrictionofcompositegeomembraneimpermeablestructuresplaysanimportant
roleinthesafeandstableoperationofanengineeringproject.Inordertoexploretheinterfacialfriction
characteristicsofcompositegeomembrane-cushion ,theindoordirectshearfrictiontest,inclinedplate
test,indoortowingplatetestandinsitutestwerecarriedouttostatisticallyanalyzetheinterfacialfriction
propertiesbetweentwodifferentgeomembranesandcushions,includingonepieceofcloth&onepieceof
film,twopiecesofcloth&onepieceoffilmasthegeomabranes,mortarandgravelsasthecushions.The
resultsshowthatfordifferentcushionmaterials ,theinterfacialfrictioncharacteristicsofsandandgravel
cushionwasbetter,itsfrictionanglewas5.0°largerthanthatofmortar,andthecohesionwas4.2kPa
higher;fordifferenttypesofcompositegeomembrane,theinterfacialfrictionangleoftwopiecesofcloth
&onepieceoffilmwas3.4°largerthanthatofonepieceofcloth&onepieceoffilm,andthecohesion
was1.2kPahigher.Indifferenttests,theresultsofthedirectsheartestwereclosertothoseofthein
clinedplatetest ;howeverthefrictionangleofthedirectsheartestwasabout30% smallerandthecohe
sionwasabout4-6kPalowercomparedwiththetowingplatetest.Theresultsofthetowingplatetest
weresimilartothoseofthe insitutest.Therefore,itisfavorabletochoosegranularmaterialasthecush
ion,andtwopiecesofcloth&onepieceoffilmasthecompositegeomembraneinthedesignoftheanti
seepagestructure,andthetowingplatetestisabetterchoicefortheevaluationofitsperformance.
Keywords:compositegeomembrane;cushionmaterial;frictioncharacteristics;directshearfriction
test;towingplatetest;insitutest
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