浅论h-v加筋黏性土的强度与变形特性

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1、上海大学硕士学位论文H-V加筋黏性土的强度与变形特性姓名：张贤波申请学位级别：硕士专业：岩土工程指导教师：张孟喜20071201上海人学硕士学位论文摘要目前，加筋土已广泛应用于公路挡土墙、堤坝、桥台、护坡等工程。然而相关加筋土的研究仍以粒状土体为主，筋条也通常沿水平方向布置。本文作者导师提出了提出了一种新的加筋方式一H．v加筋(水平一竖向)加筋，它是在传统水平筋材上设置竖向或立体筋材，其明显特征是：水平和竖向筋材都是非满布的，通过黏结它们共同构成了一个整体的三维结构。本文的研究对象是非满布的水平一竖向加筋黏性土。采用三轴试验方法对两种不同筋

2、材(镀锌铁皮、有机玻璃)的非满布水平一竖向加筋土进行了研究，分析比较了H．V加筋同传统水平加筋之间应力一应变关系和强度特性指标的差异，探讨了不同围压和不同竖向加筋高度对非满布水平一竖向加筋土强度的影响，比较了镀锌铁皮和有机玻璃两种不同变形模量的加筋材料对H．V加筋土强度的影响。通过对比，得出了非满布水平一竖向加筋土的强度特性和变形规律；最后，在试验的基础上，初步探讨了H．v加筋黏性土加筋机理，并根据极限平衡理论推导了非满布H．V加筋的强度公式，并将理论解与试验结果进行了对比，二者基本接近。关键词：H-V(水平一竖向)加筋；黏土；三轴试验；强

3、度特性；变形IV上海大学硕士学位论文ABSTRACTNowadays，reinforcedsoilshavebeenusedwidelyinretainingwalls，dams，bridgeworksandslopesetc．．However,therelatedresearchaboutreinforcedsoilsisstillmainlygranularsoilsandthereinforcementsareoRenlaidhorizontallyinthesoil．Anewconceptaboutsoilreinforced、7I

4、rimhorizontal—vertical(H-、，)reinforcingelementswasproposedbymysupervisor,prof．Zhang．111eH-Vreinforcementpatternpresentedinthispaperiscomposedofverticalreinforcingelementsor3-dimensionalreinforcements．111emostimpressivecharacterofthisH-Vreinforcementpatternisthata11reinorce

5、mentsarenon-fullandH—Vreinforcementsstrengthenthesoiltoawholesystembymeansofbond．Inthispaper,al【indofnon—fullHorizontal-VerticalinclusionsWasplacedintheclay．Soilreinforcedwithtwodifferentmaterials(galvanizedironsheet，pexspexsheet)hasbeenresearchedthroughnormaltriaxialtests

6、．AnalyzingthedifferencebetweentheconventionalreinforcedsoilandtheH．Vreinforcedsoilintermsofstress—strainrelationshipandFindingouttheirdifferenceonthestrengthindexc、缈，discussingtheinfluenceofverticalreinforcement’Sheightanddifferentconfiningpressiononthestrengthofthesolidre

7、inforcedsoil．Thenbycomparingthereinforcingeffectsofthetwodifferentreinforcingmaterials--thegalvanizedironsheetandthepexspexsheet，StrengthanddeformationbehaviourofH—VreinforcedsoilWasfoundoutfromtheresultsoftriaxialtests．Finally,basedonexperimentalresults，themechanismoftheH

8、—Vreinforcedclayhasbeenanalyzedandthestrengthmodeloftheclayreinforcedwitllmulti-layerH-Vr