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1、北京交通大學(xué)碩士學(xué)位論文大型地下洞室群開(kāi)挖方案優(yōu)化數(shù)值模擬姓名：周玲芳申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：巖土工程指導(dǎo)教師：劉保國(guó)20060301Abs缸鼉ctThedi￡fcrentexcavatillgpl鋤sofmaincav唧研tIlhjgllsidewall柚dla坦espanwerepreIiⅢinar丑yoptinlized蛐dn哪ericallystimulatcdbyempidcalanal0舒卸dmodelillgcal叫1ation．Anewconstmctionmethod，thatⅡlemiddlcm矗be鋤w勰reserved，強(qiáng)
2、dtheupp盯鋤dthedo啪IockbeaIIlwcresimultaⅡeouslyexcavated'w勰pmposed；Thestabnityofsurmundjng眥kw鷂analyzed，00nsideringtheinfluenccofmaillfaults，柚dtherelevantpreveⅡti衄mc齬uremeⅡtswercpmposcd．Thein·situsupervi∞柚dme鷸urem即tw硒done，tllercsllltshdwedthatthesurrouⅡdingrockw髂slable粕dthenewcon
3、咖ti∞methodproposedjlIthisthesisw蠲feasible．The印lcci石cworkdoneinthislh囂iswereasfbUows：1111cweakmck姍ples、】lr：hichpmduccd伊朗timpactsonsuⅡ(棚ldingrockwerecollectedonthesitc，andtheirphysical粕dmechanicalpmpenieswerctcsted，whichcanpmvidereliableinputdatafbrnumericalstjmulation；2Wjththe
4、empiIicalanalogymetllod，byshoncningtheconstmctionperiod，incfeasillgtheefficiencyofworkersandfacilities，aⅡddecfeasingtlledisturbancebe舊eeneachparallelworkplane，etc．，thefc髂jbleplaIIsformaincavemexcavatioⅡwerecomparcd，andtheconstrIlcti∞metllod'tllatthemidmerockbe鋤wasreserved卸dth
5、euppefandthedownmckbeamwefesimultaneouslyexcavated，waspTclimilla—lydetermined；3The、，olumeoftheplaSticyieldzoneandthemaximumdef0瑚ationonthekeyposiⅡonofsu玎oundingrockcausedbyeXcava￡edwefeconsidercd豁thecrjtedon，andsimulatedcalculationsofpossible∞mbinedexcav砒ionschemesweredone0nt
6、tlemaincaVembyapplyillgFLAC3D．BaSedonana王yzingthestressesaIIddefbnnationsjnthesurround{ngrock，theschemethatttlemaincavempreservedinterlayerwaseduccdbettcrthanthetraditionaloneexcavatingthemaincaVemfromthetoptottlebottomintur
7、1；4BasedoⅡthesjIIlulatedcalculationby印plyiIlgFLAC3D
8、，howt
9、IefaultsimperiledthestabiljzationofthellIldergI帥ndcavjtywasanalysed，andthercsunshdwedtllattllesu仃。瑚dingroc：I【shadhuges仃essesalldafeasOfdefbmati衄粕dpl盛tidtyamundtheplaceswhercthef孤ltsF4粕dF6intc塔ectcdtlIemaillcavem．Eachfaunw勰a黝odbydif：fj刪lldispla懈nents，t0陪ions越Idshea培f如mth
10、esmroundingrocl【s衄bolllsidcsof“，s0thef赴l(fā)忸werewhollydcs昀ycd．Thcfaults
