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3,,,(,610065):,,,,:;;;:TV511;TV52:B:100122184(2000)03200802031,,,,,,:,,,,(),,,,,,,,,,,,,,22.1:19992072193:962221205205203,,,,,,,1,,,,022,(,),,,,,,80,,,,,,,,,2.2,,,,0819320009SichuanWaterPowerVol.19,No.3Sep.,2000©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.1,,,,,,:(1),n(75),,:10,5,3,2,(5ö10,3ö10,2ö10,0,0,0,0)(2)n(Li1Li2Li3Lin,,R:Ri=(0,,0x,1-x,00)LL+1Wi,LWiLiLLiL+1,x:LiLx+LiL+1(1-x)=Wi,,4:(1)F(x)xx,F(x)0,1,F(x)(2)n,,F(x)=1Fmax,Fmax=1,ix(i),x(i)=Fmax,ix(i),A,ix(i)A(x(i)öFmax)(3)nx(1),x(n):A(x(n)öFmax)ff:x(k)Lk,f(x(n))=1f(x(k))=kön=Lk,k=1,2,n(4),3,,:Wj(i)=nk=1(8-k)rjk(i)n,r(i)jkW(i)=mj=1aj(i)Wj(i)mi;aj(i)W(x)=zi=1aj(i)Wj(i)x;z,,:Ni(k)=Qmaixmakxûx0(k)-xi(k)ûûx0(k)-xi(k)û+Qmaixmakxûx0(k)-xi(k)û18©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.ri=1NNk=1Ni(k)ûx0(k)-xi(k)ûkx0xi;maixmakxûx0(k)-xi(k)û;Ni(k);ri;N;Q,0.54,,,,,,,,6,,5,,,,,,,,,,,n(),,;,,,,,,,,,,,,,64,4,189,6,9,,,12112340.90570.88440.93380.9400212344.10644.04743.89413.88953.60003.60003.90004.20004.86894.89234.99405.39393.59744.16474.64174.64173.86043.93674.12024.29721,43122,4321,,4,2,:1;4,,7,,:(1),,,,(2),,,,45;,,45,,,(3),,(85)28©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,20min,,2.3,,,,,,,;:,,,,,3330kW,,33km,116400km2,,,,,,,(FEC)(ARQ),,,(),,,,;,4,,,,,,:,,,,:(19682),,,,,.(82),(4),,,,,,(,,),(5),,,,,,[5]:[1],.[M].:,1994.[2].[M].:,1992.[3].[M].:,1988.[4],.[J].,1997,11(3).[5].[J].,1987(7).:(19752),,,,,;(19362),,,,;(19692),,,,,;(19722),,,,,.:2000109,58©1995-2003TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.ABSTRACTExcavationofHeadraceTunnelsatTianshengqiaoIHydropowerStationDAIBoWUXu(Chinese7thConstructionBureauofWaterConservancyandHydropowerEngineering,Pixian,Sichuan,611730,China)Abstract:ConstructionprocedureandmethodduringexcavationofheadracetunnelsatTianshengqiaoIHydropowerStationarepresented.Undertheconditionsofsmalldistancebetweentunnelaxis(netdistancebetweentunnelsis12.4m),thinoverlyingstrata,weakrockanddevelopeddiscontinuity,newAustriantunnelingmethod(NATM)isstrictlyappliedandalternatebayexcavationisusedfortunnelstoensuresafetyintunnelconstruction.Keywords:TianshengquaoIHydropowerStation;headracetunnel;excavations;safetyOptimizationofConstructionTechniqueAlternativeforDayuanduHydropowerProjectZHANGJian2wen(Chinese7thConstructionBureauofWaterConservancyandHydropowerEngineering,Pixian,Sichuan,611730,China)Abstract:DayuanduhydropowerprojectislocatedonXiangjiangRiverandisakeyprojectoftheState.Duringconstruction,jointventureofChinese7thand9thConstructionBureauofWaterConservancyandHydropowerEngineeringworkstogetherwiththeDesigner,theSupervisorandtheOwner.Basedonactualprojectconditions,constructiontechniquealternativesarecontinuouslyoptimized.Newtechniquesareboldlyappliedtoensureconstructionqualityandaccelerateprojectprogress.Thefirstunitiscommissionedintooperationaheadoftimeandthewholeprojectiscompletedaheadofschedule.Keywords:Dayuanduproject;constructionalternative;optimizationTemperatureControlforGroundConcretePlacementatPermanentLockofThreeGorgesProjectduringSummerConstructionWENJia2haiLIUWei2gangBAIYong2sheng(ThreeGorgesProjectHeadquarters,Chinese7thConstructionBureauofWaterConservancyandHydropowerEngineering,Yichang,Hubei,443133,China)Abstract:ThepaperpresentsvarioustemperaturecontrolmeasurestakeningroundconcreteplacementatpermanentlockofThreeGorgesProjectduringsummerconstructionof1999.Practiceshowsthatwithpropertemperaturecontrolmeasures,abundantplacementofconcreteinfoundationconstrictareaandmassconcreteinhotsummertimenotonlymeetsrequirementsofconcretetemperaturecontrol,butalsoeffectivelyreducedconstructionperiod.Keywords:ThreeGorgesProject;lock;concrete;temperaturecontrolmeasuresConstructionofPre-stressedAnchorCableforLowBarragePierofReleaseSluiceatDayuanduHydropowerProjectontheXiangjiangRiverMABang2kaiLUOJian2linLIMei2liang(China7thconstructionBureauofWaterConservancyandHydropowerEngineering,Pixian,Sichuan,611730,China)Abstract:IndesignoflowbarragepierofreleasesluiceatDayuanduhydropowerproject,4800kNpre2stressedanchorcableisusedtochangestressstateinbracketandbeforebracket.Accordingtoconstructionconditions,constructiontechniqueofpre2stressedanchorcableinpierandsomeproblemsforattentioninconstructionarepresented.Keywords:Dayuanduproject;pier;pre2stressedanchorcableOnImportanceforConstructionofPubugouHydropowerStationFromViewofImplementationofInterconnectionofNetworksandWest-to-EastPowerTransmissionProjectHEYi2hua(GongzuiGeneralHydropowerPlant,Leshan,Sichuan,614900,China)Abstract:ThedevelopmentofPubugouhydropowerstationshouldbeacceleratedinneedsofdevelopmentinwestregioninChina.Oneofeighteconomicalworksinthisyearistoseizethechanceandstartimplementingdevelopmentinwestregion,whichismadebytheCentralGovernment.ConstructionofPubugouhydropowerstationwillprovidepowerfulenergysupplyforeconomyinthesouth2westregionandcreatefavorableconditionsforimplementationofinterconnectionofnetworksinChinaandWest2to2EastPowerTransmissionProject.Keywords:Pubugouhydropowerstation;developmentinwestregion;strategyselectionAppli