橡膠—砂混合土宏細(xì)觀力學(xué)特性研究.pdf

1、分類號(hào)U416學(xué)校代碼10129UDC625.7學(xué)號(hào)2012215006橡膠—砂混合土宏細(xì)觀力學(xué)特性研究ResearchonMacroMicromechanicalpropertiesofRubbersysoil申請(qǐng)人：李鵬娟學(xué)科門類：工學(xué)學(xué)科專業(yè)：森林工程研究方向：道路工程指導(dǎo)教師：王國忠教授論文提交日期：二〇一五年六月ResearchonMacroMicromechanicalpropertiesofRubbersysoilAbst

2、ractWithChinaseconomicdevelopment，theautomotiveindustrydevelopsquickly.Thedealofwastetirescausethepeople’sattention.Thescraptirerubbergroundwithacertainsizeofparticlesareincpatedintothesasroadbedfillerwks.Thegoodrubberpa

3、rticlestrengthflexibilityhighfrictionacteristicsareusedtoimprovetheshearstrengthofs.Thismethodcannotonlyhlealargenumberofrubbertiresbutalsotherecyclingofresources.Thisapproachhascertaintheeticalpracticalsignificance.Them

4、echanicalpropertiesofsrubberwerestudied.AccdingtothegeologicalacteristicsoftheInnerMongoliathefactsthatrubberparticlescontentparticlesizetheexperimentalconditionsintoaccount.Bydirectsheartestresultsthevariousfactsontheru

5、bbertheimpactofslightsoilshearstrength.ThispaperanalyzesthemicroscopicparametersoftherubberSinfluenceofmacroscopicmechanicalpropertiesoflightsoilbydiscreteelementparticlesstreamingsoftware.Inthispaperthefollowingconclusi

6、ons：（1）Rubberparticlescontainingscanincreasedinternalfrictionangleofsimprovetheshearstrengthofs.Bestcontentrubberparticlesis10%theoptimumparticlesizeof4mesh.(2)RubbersysoilofdirectsheartestsweresimulatedPFC2DSoftware.The

7、simulationresultslabatytestresultsweresimilar.ThisresultsuggeststhatthesoftwarecanbeusedtosimulatePFC2Ddirectsheartests.(3)Theshearstrengthofthesampleinitialmoduluswillbechangedbychangingthecontactstiffnessofsparticles.I

8、nternalfrictionangleincreaseslinearlybyincreasingthecoefficientoffrictionbetweensparticles.Frictioncoefficientofsparticleshaveagreatimpactinthemacroscopicpropertiesofrubbersysoil.Thesamplewithlargervoidratioshowedastress

9、hardeningphenomenonthesamplewithsmallervoidratioshowedastresssofteningproperties.Theaveragecodinationnumberofthesamplewithsmallervoidratioislargertheaveragerotationrateissmaller.Wellgradedspecimendensestructureisstablema