任务精读：喷射混凝土支护（双语）课件讲解.pptx

隧道施工技术喷射混凝土支护TunnelConstructionTechnologyShotcreteSupport

喷射混凝土的特点1喷射混凝土的作用2喷射混凝土支护目录课程小结4喷射混凝土的工艺种类及特点2TableofContentsShotcreteSupportCharacteristicsofShotcreteFunctionsofShotcreteProcessTypesandCharacteristicsofShotcreteSummary

.案例导入混凝土喷射施工这层结构有怎样的特点？它对围岩产生怎样的一种作用呢？Whatarethecharacteristicsofthestructure?Whatisitseffectonthesurroundingrocks?CaseIntroductionConcretespraying

喷射混凝土的特点CharacteristicsofShotcrete01

喷射混凝土支护喷射混凝土的特点ShotcreteSupport强度增长快Rapidstrengthincrease粘结力强Strongadhesion密度大Highdensity抗渗性好GoodimpermeabilityCharacteristicsofShotcrete

喷射混凝土支护喷射混凝土的特点ShotcreteSupportCharacteristicsofShotcrete输送Conveying浇注Pouring捣固一体化Tampingintegration

喷射混凝土支护喷射混凝土的特点ShotcreteSupportCharacteristicsofShotcrete10min左右终凝

Finalsettinginabout10minutes2h后即具有强度

Havestrengthin2h四天达到28d强度的70%左右About70%ofthe28dstrengthinfourdays

喷射混凝土的作用02FunctionsofShotcrete

喷射混凝土与围岩密贴粘结，可以防止围岩强度恶化，阻止不稳定块体的塌落，起到“支撑围岩”的作用。喷射混凝土支护喷射混凝土的作用ShotcreteSupportFunctionsofShotcrete支撑围岩SupportingsurroundingrocksCarrierring承载圈Theshotcretecanbecloselybondedwithsurroundingrocks,whichcanpreventsurroundingrockstrengthfromdeterioratingandpreventunstableblocksfromcollapsing.Thatsupportssurroundingrocks.

喷射混凝土能有效控制围岩在不出现有害变形的前提下，进入一定的塑性，从而使围岩“卸载”。喷射混凝土支护喷射混凝土的作用ShotcreteSupportFunctionsofShotcrete“卸载”作用UnloadingfunctionShotcretecaneffectivelycontrolsurroundingrocksinenteringacertainplasticstagewithoutharmfuldeformation,whichcanunloadthesurroundingrocks.

喷射混凝土可以填充表面凹穴，使裂隙分割的岩块层面粘联，保持岩块间的咬合、镶嵌，可以“填平补强围岩”。喷射混凝土支护喷射混凝土的作用ShotcreteSupportFunctionsofShotcrete填平补强围岩FillingandreinforcingsurroundingrocksShotcretecanfillthesurfacedepressionsothattherockblocklayersdividedbythefissurearebondedandtheinterlockingandinlaybetweentherockblocksaremaintained,fillingandreinforcingsurroundingrocks.Bonding粘结Shearing剪切Bonding粘结Shearing剪切

喷射混凝土直接粘贴岩面，形成防风化和止水