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1、英文原文ANALYSISOFINSITUROCKBOLTLOADINGSTATUSD.H.S.ZouDept,ofMiningEngineering,DalhousieUniversity,CanadaAbstract:Rockboltsarewidelyusedinrockengineeringforgroundstabilization.Theanchoragequality,theloadingstatusandtheboltintegrityareofmostconcerninthefield・Ro
2、ckboltsperformanceiscurrentlyassessedbypulloutortorquewrenchtests.Thesemethodsaredestructiveorinaccurateandcannotprovidealltherequiredinformation.Consequentlysomeresearchisdirectedtonon-destructivetestingmethods.However,duetothecomplexgroundconditionsandth
3、eloadingmechanismofrockbolts,itisstillachallengetomonitortherockboltperformanceinsituquantitativelyandaccurately.Thetensiondistributionalongaboltforvarioustypesofboltsisoftennotwellunderstood・Theconditionofthesurroundingrockmassandthevaryingfieldstressesfu
4、rthercomplicatetheproblem・Thisarticlewillthoroughlyanalyzemobilizationoftheanchoringforceanddistributionofthebolttensionformechanicallyanchored,grouted,pre-tensionedandun-tensionedrockbolts・Thetermsloadbearingcapacityandanchoragequalityofrockboltswillbecla
5、rified・Theeffectsofgroundmovementwillalsobeexaminedwithaninsightintothefuturedirectionforrockbolttestingandmonitoring.Keywords:rockbolttension,norndestructivetest,loadcapacity,anchoragequality.1・IntroductionRockboltsarewidelyusedforgroundsupportinrockengin
6、eering,suchasinhighwayslopes,hydrodams,undergroundmineworkingsandopenpithighwalls-Basedoninstallation,rockboltsmaybeclassifiedasmechanicallyanchored,fullyorpartiallygrouted(withresinorcement)andfrictionbolts.Thegroutedboltsmayalsohaveabearingplatewithiniti
7、altension.Theprimaryfunctionofrockboltsistoholdtherockmasstogetherandincreaseormaintainthegroundstability.Inthefield,theanchoragequality,theloadingstatusandtheboltintegrityaremostconcerned.Atpresentthecommonpracticeofassessinganchoragequalityisbypullouttes
8、t(Choquet1991)andsometimesbytorquewrenchtest(Seeber1992).Bothmethodshavelimitedcapabilityandcannotprovidealltheneededinformation.Theyaretimeconsuminganddestructiveorinaccurate.Otherresearchers(Thurner198&Hira
