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ValueEngineeringValueEngineeringValueEngineering1。～～、。S37.25。O2S～、～。、～。22.15～50cm5～20mm1～10mm20mm。2.2。2.3、、。。3。。4“、、、、”。。、。4.1、、、。。4.1.1。III、IV。ф25ф32。、、。4.1.1.1aa=12~16d。acmdmm。d=40mma48cm。4.1.1.2B。。K=a/BK=0.6~0.8K0.8B=60cmB=0.5~0.8。4.1.1.3。80%。。kg/m。q=QaB。q—kg/mQ—kg/m3a—mB—mQ0.6~0.8。Q=0.65q=0.234q=0.15～0.25kg/m。q=0.15。20.3kg。4.1.1.4。①ф25②1/2ф25。4.1.1.5———————————————。。4.1.24.1.2.1。5cm。4.1.2.220cm10cm。ConstructionTechnologyofHorizontalRockofXishanTunnelZhaiXinli714000TheFirstEngineeringCo.Ltd.ofChinaRailwayFirstBureauGroupWeinan714000China：。。Abstract:TherockofthemaintunnelinGujiaoexportterminalofXishanTunnelislevelshapelimestone,levelandjointfissuresisingrowth.Afterblastingthetunnel,thearchrockfallingisverycommon.Byadjustingtheblastingparametersandothermethods,itreducedthedisturbanceofrock,significantlyreducedthenumberofsuper-digging,ensuredtheconstructionsafetyandimprovedtheconstructionschedule,andachievedgoodeconomicresults.：Keywords:horizontalstratablastingconstruction：TU74：A：1006-4311201116-0095-02———————————————————————：1970-、。1·95·15cm2。。。4.1.2.3“”。L0=0.2～0.5W20cm30cm。。4.220～30cm。4.3、8cm。。。312。5。、。6、50cm10cm70%-80%。：[1]..,2007,(3).[2].20039.[3].[J].20103.02×300MW#1146.8m×68.4m、810T37.6T、23.4m×5.707m。93.6m33.00m。1TC705225T50T160T50TTC70522。30T。AA-A6-A4-AC→A6-A4-AE→AA-AC-A2→AE-A2→。→→→→、→→、→→、。22.1。———————————————————————：1978-。SteelStructureInstallationConstructionofAirCoolingPlatformWangJunjie230000AnhuiEletricPowerConstructionNO.1CompanyHefei230000China：2×300MW#1。、、。、、、。、。Abstract:ChinaPowerInvestmentSinkiangWusuThermalPowerPlantStageI(2×300MW)UnitProject#1AirCoolingPlatformadoptssteeltrussstructure.Steeltrusshasthecharacteristicsofgreatspan,highsectionheight,bigweightandthelike.Integralinstallationtechniqueoflongspansteeltruss,constructionprocess,liftingorder,qualityandsafetycontrolmeasuresareintroducedaimingatdifficultiesfortheprojectconstruction.Theprojectschedule,qualityandsafetyareensuredduetoappropriatemeasuresandreasonableorganization.：Keywords:trusscombinationinstallation：TU74：A：1006-4311201116-0096-0212·96·