文献翻译提升机基础设计的几个问题Word格式文档下载.docx

文献翻译提升机基础设计的几个问题Word格式文档下载.docx

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overturning;

anti-slip;

stability

Preface

Surfacecoalminehoistroomisanimportantpartoftheproductionsystem. 

TiedwithDerrickimportantstructuresfortheupgradingofthesystem. 

Withtheincreaseincoalproductioncapacity,upgradingtheprevioussingle-modecannolongermeettheneedsofmodernproduction,theprogressivedevelopmentofmulti-round,multi-ropeliftingway. 

Enhancetherope'

spullalsoincreasedandroleoftensionbasedonthehoistisalsogrowing. 

Thepast,thebasisofasingleShengtiliftweightalonecanmeettherequirementstoenhancethestabilityofmachine. 

Requirementsmayconstructthefoundationmadeofplainconcretefoundation. 

Mineisalargemachineusedinmultirope,thenpartofthefoundationalonehoistweightfallsfarshortofbasicstability. 

Needtobroadenthebasisofweightorothertechnicalmeasuresusingotheranchor. 

Therebyenhancingmachine-baseddesignraisesnewproblemsandnewdemands,moreandmoreattentionbytheengineeringandtechnicalpersonnel.

1Hoist-basedstressanalysis

1.1Determinationofhoistropetension

Wireropeatoneendandraisethecontainerskiporcageconnectedtotheotherendisconnectedwiththehoistdrum. 

Derrickandhoistthroughthesupportformthebasisofforcebalancesystem. 

Therefore,thewireropeintheropeloadderrickloadcanindeed 

.Determinedasfollows:

1）Thenormalworkloadwhenthehoistrope（Qk）Standardvalue:

press"

Mineheadframedesign"

GB50385-2006No.41113inthecalculation. 

2）whenthewireropeoffropeload（Ak）standardvaluesforsingle-ShengTil,inwhicharopeforthebreakShengHesetout,theother2timesthenormalload;

formultirope,ofwhichthesideShengHesetallthebrokenrope,theothersideofthe0133timesforalltheropeoffShengHeset.

1.2Hoistequipmentandbasicloadtransferbetween

Generalequipmentmanufacturerstoprovideinformationtoenhancemachine-based,andstructureassociatedwith:

Equipmentandsizepointoftheforce,Hole,casing,boltsandsteelshearkeysandsoon. 

Figure1.

KnownbytheFigure1:

hoistbyboltsintension,shearsteelshearkeytothelevelofforcetransmissiontothefoundation. 

Hoistthebasisofthewhole,forthemassivefoundation. 

Computationalmodelofarigidbody,basedonrelativelylittlebetweenthevariouspartsofdeformation,stresslevelislow,generallymayfromtimetocalculateanoverallstrength. 

70'

sRedFlagFactoryinthe20thcenturybrandcompressorassembly-baseddeterminationofthesurfaceofsteelstressisonly70~140N/cm2[1]. 

Thelargevolumeofconcretefoundationconstructionconcretehydrationheatinordertopreventtheformationofinternalandexternaltemperature,andthetemperaturecracks,generallyrequirebasicstructuralsteelsurfaceconfiguration. 

Butintheelevatorequipmentandthedirectinteractionbetweentheconcretefoundationofsomeofthestressconcentrationsignificantly,theneedforcomputingandreinforcement,thedesignerofteneasytooverlook.Mainlyforthefollowingtwoparts:

thebasisofconcretelocalofficeboltpressureplate,steelembeddedinconcreteshearkeypart. 

Thetwositesofforcetransmissiontothebasehoistthekeypartsofthedesignshouldenhancethemachine-basedreinforcementcalculationoflocalstressandattention. 

Thefollowingdetaileddiscussionofthesetwopartsseparately.

1.2.1Partialpressureofconcrete

Generalboltsprovidedbythemanufacturer,askedthelocationofcivilengineeringprofessioninthecorrespondingburiedsteelcasing,elevatorboltandpullthroughthenutonthelocalpressureofconcretedeliveredtotheconcretefoundation. 

Concretelocalforcemodelsimilartotheanchorplatewithend. 

Concreteinthebase450alongthefailuresurfacediffusiontoformacone. 

Inordertoavoidbrittlefracture,canbeextendedtoformalargerconeboltfailuresurface,oraroundthebolttoconfigurethereinforcedconcretesothattheboltpullinwholeorinpartbythereinforcedpassedon. 

Atthispointrequestedbythedestructionoftensilereinforcementintheconebaseplaneandthelowerpartofthelengthofnotlessthanthetensilereinforcementanchoragelength.

Nutwasherinconcreteinthelocalcompressivestressisconcentrated,inordertopreventlocalcrushingofconcrete,thisshouldbepartofthereinforcedconcreteconfigurationindirectbinding,thespecificcalculationandconstructionrequirementsseethe"

designofconcretestructures"

GB50010-2002relatedtotherequirementsofsection 

.

Manufacturerstoprovidetheembeddedsteelcasingandinternalboltgapbetweentherelativelylarge,refertotheanchorprestressinganchorageendstheconstructionrequirements,shouldsetthebasisforconcreteandsteelpipeweldedsteelplateembedded. 

Steelplatesizetonomorethanthereservedendsboltholewidthisappropriate. 

Setofsteelplatehastheadvantageofstresscanbefurtherspreadandreducethestresslevelofconcretearoundthecasing.

3.AmericanPetroleumInstitute,Spec!

fication/brWireRope.APISpec（fication9A（Spec9A）,23rdedn.Washington,DC,1984.

4.Djivre,M.,MineShaJ~Ropes:

OntarioDestructit~eWireTestin,qProgram.OntarioMinistryofLabour,Sudbury,Ontario,16January1991,p.5.

2Calculatedbasedonthestabilityofthehoist

Hoistbyboltsandsteelandconcreteshearkeybasefusedtoworktogether. 

Ropeforceupgradeprocessrequirementsunderthedirectionofthehorizontalangleisgenerallynotlessthan50°

. 

Improvethelevelandtheverticalcomponentropearerelativelylarge,androughlyequal. 

Enhancethepullropeonadiagonalbasisofthestabilityofnegativefactors. 

Therefore,thestabilityoftheneedforbasiccomputing. 

Stabilitycalculationbasedalsoincludestwoaspects:

thebasisandfoundationforoverturningtheanti-slip.

2.1Overturningthebasisofcalculation

2.1.1Overturningstabilitycalculationsdeterminetherotationaxis

2.2Calculatedbasedonanti-slip

Therearetwopossibilitiesbasedonsliding,asurface-basedsubstrateandthesubstratetoovercomethefrictionbetweensoilandslidingalongthesubstratesurface. 

Anotherlevelofforcetoovercometheinternalfrictionofsoiltofoundationandthebearinglayerofsoilwiththeslidingpart. 

Thelattergenerallydifficulttooccurbecausethesubstratetoallowthegeneralstressofacertainsafetyfactor,whichguaranteesthebasalsoilwillnotproducelocalizedplasticflowtoachievetheultimatebalance. 

Therefore,theonlycasebeforetheanti-slidestabilitychecking. 

Intheslidetherearetwofavorablefactorsinthecalculationarenottakenintoaccount. 

①roomwithacertainthicknessofconcretemadeonthebasisofrigidanti-slideflooreffect,infact,reasonablyrigidfloorstructurehasagoodfoundationtopreventslidingfunction;

②backfillaroundthesolidbasisofaroleinstabilizingcertainbasic 

effect. 

Alsobasedonthefoundationsoilbeforethepassiveearthpressurearegenerallynotconsideredbecauseofpassiveearthpressureoftenassociatedwiththebasisoffullslidingoccurs,andisnowcommonlyusedCoulombtheorytoyieldthevalueofpassiveearthpressureistoolarge. 

Therefore,takentogether,canreducethesafetyfactoragainstsliding,especiallyinthecaseofaccidentalloads.

"

GB50385-2006providesthat:

derrick-basedanti-slipstabilityfactorof112. 

Alsoprovides:

thefoundationandbasisfor,fromtimetobrokenrope,anti-droppingbrakingeffectofseismicloadeffectandthecombinationofchecking. 

Therefore,thebasisfortheelevator（squat-typeshallowfoundation）intheoffShengHesetstableundertheactionofanti-slipcoefficientismoreappropriateforthe111~112,projectscanbeeconomical.

3Otherissuesneedingattention

1）Sometimes,inordertoincreasethebasisofweight,oftenthereducer,motorbaseandhoistbaseasasingleentity. 

Atthispoint,therearecenter-basedforcetogetherwiththeprojectionropehoistpositionofgreatereccentricity. 

Inthedesignbasisshouldbeadjustedtosomeofthegroundbelow,sothatthecenterofthetwoascloseaspossible. 

Weightinordertofullymeetthetheoreticalassumptions. 

2）Astheelevatorbasedonthedesignlayoutofthemainstructurebythesurroundinglayoutandcannotre-expandsize. 

Canbetakentoincreasetheanti-slide,anchorandupliftpiles. 

ToensurethatthefoundationShengHesetoffunderthestability. 

3）Toimprovethecapacityofhoist-basedslidingtheoptionfollowingstructuralmeasures:

①setrigidfloor,foundationbackfillaroundthefillinglayercompactingram;

②forsoilunderthefoundationunderside;

③increaseDepthofFoundation;

④headframeandhoistroombasedontheactuallayoutofthesituation