揚巴污水提升泵站壓密注漿施工組織設(shè)計方案

1、污水提升泵站壓密注漿施工方案污水提升泵站壓密注漿施工方案一、一、前言前言Preface污水提升泵站壓密注漿主要針對其基坑底板下部的約1.8m厚的粉土，因其底板呈階梯部，部份土體滑動，造成部份底板與其下部粉土的分離，而形成空洞，目前通過現(xiàn)場勘察，因破壞處為1631.8m。因而要求采用注漿方式進行土體加固。Thisplanismainlyaimedatabout1.8mTHKpowdersoilinthebottomslaboffounda

2、tionpit.Asthebottomslabisinasteppartofthesoilisslidedsomeslabsareseparatedfromthepowdersoil.Sothehollowsturnup.Afterthesiteinvestigationasthebrokenareais1631.8mmethodofgroutingshouldbeadoptedfthesoilstrengthening.二、二、壓密注

3、漿方法壓密注漿方法MethodologyfCompactionGrouting該工程基坑底板現(xiàn)已澆注成功，依據(jù)現(xiàn)場的破壞程度及以往的施工經(jīng)驗，先通過人工方式在底板開孔，然后依據(jù)水灰比0.5~0.6的方案進行攪拌水泥漿，再將攪拌均勻的水泥漿用機械方式輸入孔洞中，已達到加固地基土為目的。Thebottomslabinfoundationpithasbeensuccessfullyplaced.Accdingtothedamagedegree

4、ourconstructionexperiencefirstlywewillmakeholebymanpowersecondlymixcementmtarinawatercementratioof0.5~0.6.Thencementmtarwillbeconveyedintoholesbymachinetomeettherequirement.三、三、施工淮備施工淮備ConstructionPreparation1、設(shè)置制漿站、加漿站盡

5、量減少移動次數(shù)。Establishthemtarprocessstationaddingstationtominimizethetimesofremoval.力，此泵最大壓力可達到8MPa。200typeHPpumpselfowneddieselgeneratwillbeused.Themaximumpressureofpumpis8MPa.注漿時應(yīng)采取跳越注漿，這樣可使?jié){液充填密實。Itwillbegroutedinskiptomee

6、tthedensityrequirement.2、工藝流程：WkmanshipFlowt人工依尺寸成孔攪拌水泥漿液小壓力注漿待初凝后再度注漿封孔。ManualHolesMakingAsSizedCementMtarMixingGroutingwithLPSecondGrouting(Afteritisgenerallyconsolidated.)SealHoles3、注漿技術(shù)要求：TechnicalRequirementsfGrouti

7、ng1)水泥漿液配制水灰比0.5~0.6；初次注漿時壓力控制在0.2~0.3之間；待12小時后，再次注漿，二次注漿壓力不得超過0.5MPa。以防止壓力過大，造成基坑底板的破壞，注漿時可依據(jù)現(xiàn)場施工情況下調(diào)整注漿壓力。Thewatercementratiois0.5~0.6.Intheinitialgroutingthepressureshouldbecontrolledwithin0.2~0.3.Itwillbesecondlygrou

8、tedafter12h.Thesecondtimepressurecannotexceed0.5MPatoavoidthedamagefbottomslab.Thepressurecanbeadjustedaccdingtotheactualcondition.2)漿液配制采用425#普通硅酸鹽水泥，水灰比0.5~0.6，注漿量以漿滿出底板為止。425#Ptlcementwillbeusedfmixingwiththewaterceme