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1、英文原文ANALYSISOFINSITUROCKBOLTLOADINGSTATUSD.H.S.ZouDept,ofMiningEngineering,DalhousieUniversity,CanadaAbstract:Rockboltsarewidelyusedinrockengineeringforgroundstabilization.Theanchoragequality,theloadingstatusandtheboltintegrityareofmostconcerninthefield・Rockboltsperformanceiscurrentlyass
2、essedbypulloutortorquewrenchtests.Thesemethodsaredestructiveorinaccurateandcannotprovidealltherequiredinformation.Consequentlysomeresearchisdirectedtonon-destructivetestingmethods.However,duetothecomplexgroundconditionsandtheloadingmechanismofrockbolts,itisstillachallengetomonitortherock
3、boltperformanceinsituquantitativelyandaccurately.Thetensiondistributionalongaboltforvarioustypesofboltsisoftennotwellunderstood・Theconditionofthesurroundingrockmassandthevaryingfieldstressesfurthercomplicatetheproblem・Thisarticlewillthoroughlyanalyzemobilizationoftheanchoringforceanddist
4、ributionofthebolttensionformechanicallyanchored,grouted,pre-tensionedandun-tensionedrockbolts・Thetermsloadbearingcapacityandanchoragequalityofrockboltswillbeclarified・Theeffectsofgroundmovementwillalsobeexaminedwithaninsightintothefuturedirectionforrockbolttestingandmonitoring.Keywords:r
5、ockbolttension,norndestructivetest,loadcapacity,anchoragequality.1・IntroductionRockboltsarewidelyusedforgroundsupportinrockengineering,suchasinhighwayslopes,hydrodams,undergroundmineworkingsandopenpithighwalls-Basedoninstallation,rockboltsmaybeclassifiedasmechanicallyanchored,fullyorpart
6、iallygrouted(withresinorcement)andfrictionbolts.Thegroutedboltsmayalsohaveabearingplatewithinitialtension.Theprimaryfunctionofrockboltsistoholdtherockmasstogetherandincreaseormaintainthegroundstability.Inthefield,theanchoragequality,theloadingstatusandtheboltintegrityaremostconcerned.Atp
7、resentthecommonpracticeofassessinganchoragequalityisbypullouttest(Choquet1991)andsometimesbytorquewrenchtest(Seeber1992).Bothmethodshavelimitedcapabilityandcannotprovidealltheneededinformation.Theyaretimeconsuminganddestructiveorinaccurate.Otherresearchers(Thurner198&Hira
