锚固缺陷影响锚杆受力分布规律与检测技术研究

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1、场带有锚固缺陷锚杆的拉拔试验，根据锚固缺陷长度与锚杆弹性极限拉拔力之间的关系确定锚杆锚固缺陷段的长度以及占锚杆锚固段的百分比，对比理论结果和试验结果，两者的结果比较吻合。为锚杆锚固缺陷长度的确定提供了一种方法，对锚杆锚固质量的评价具有一定的参考价值。本文采用这种检测方法对实际工程的锚杆锚固质量进行了评价。关键词：锚固缺陷；锚固段；应力分布；拉拔试验；检测技术研究类型：应用研究Subject:StudyontheLawofAnchoringDefectsAffectedtoStressDistributionofBoltandDete

2、ctionTechniqueSpecialty:ArchitectureandCivilEngineeringName:ZhangJing（Signature）Instructor:GuShuancheng（Signature）CaoZhen（Signature）ABSTRACTBoltanchoragingasaneffectivestrengtheningwayhasbeenwidelyusedingeotechnicalengineeringandminingengineering.Inpastfewyears,domesti

3、candforeignscholarshavemadealotofstudyonboththereinforcementmechanismandstressdistributionoftheintactanchorageboltandnondestructivetestingtobolt,whichattainedalotofachievements.Butthestudymostlybasedontheintactanchorageboltandlittleontheboltwithanchordefects,moreoverth

4、erearesomeproblemsinanchoragedectectionofbolt,acousticcharacteristicsofanchoragesystemandtheory,acousticdataprocessingtechnologyandtheevaluationonthehealthstatusoftheanchoragesystem.Thepull-outtestisusedtotesttheanchorageforceofboltinmostengineering,whichcan’tevaluatet

5、heanchoragedefects.Soitissignificanttomakestudyonusingpull-outtesttoevaluatethestatuoftheanchorage.Thisarticleestablishesthetheoreticalmodelofboltswithanchoringdefectsandsolvesthestressdistribution,thentheinterfaceparametersareanalyzed,itcombinedthepull-outtestinthefie

6、ldandtheoryanalystoevaluatethequalityoftheanchorageofbolt.Thispapermaincontentsandconclusionsareasfollows:Thefailuremodeandanchoragemechanismofbolthasbeenanalyzed.Thefailuremodeandreasonofanchorageboltaresummarized.Thebondmechanismandmechanicalbehavioroftwointerfaceswe

7、reanalyzedintheprocessofloadtransfer.Theexistingshearslipmodelbetweentherockmassandtheanchoragehasbeensummarized.BasedontheshearslipmodelofporewallestablishedbyB.Benmokrane,takingtheloadtransferfunctionmethod,anelastic-plasticmodelsetupforanalyzinginterfacebetweenancho

8、ragebodyandsurroundingrockoftheboltwithsingleandmultipleanchoragedefectsunderdrawingforceintheelasticstageandplastics