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1、roductionandpreventionandcureofthecrackofskyscraperAlongwiththespeedingoftownhouseconstructionstep,notafewareaswithsmallresidencessetuponeafteranother,manyinhabitantsmovecontinuouslyintothenewresidence,theirqualitytohousingrequestismoreandmorehigh,particularlypayattentiontoverymuchtosome
2、crackscircumstanceswhichsprinklebuildingplanktoappearnow,worrythesecracks'aringendwillcauseinsecuritytrouble,butinsuccessiontobuildingqualitydirectthesectionhurltell.Suchasoncethesomecitydevelopacompanytosetup6layersoffloorresidence16totally,constructingareaabout100,000squaremeters,thebr
3、ickmixsstructure,thebeginningrepairs,onesteps2boxoffwiththebrickwall,eachone'sestablishingaturnofbeamtogetherbuildingplankistogetherwholetosprinkle,theplankthick100mms,concretemarknumberisC20,houselongaboutwith80-90ms,don'testablishflexiblesew,firstflooristhe2.2mgaragelayer,theC20reinfor
4、cingbarcageofthefoundationadoptioninfusestonoteastake.It'ssmallarea'sturntocompleteworkinOctober,2003,finishingconstructionacceptance,didn'tdiscoverobviouscrack,discoverthebuildingplankappearscrackwhentheinhabitantrepair,pastjointlytoqualitydirectthesectionhurltell,throughsteptoseeonthes
5、pot,16housesallexistthedepthdifferentcrack.Thecrackwidthisbetweenthe0.2mmsmms-0.4ses,thegreatmajorityofthecrackpositionisplacedinplankfourCapes,thedynastysunismoreobvious.Hence,theSuperintendentofficeofqualityconcerned,sinkingtodeclinequantityandinclinationdegreetocarryonareexaminationto
6、thehousefirst,resultallinallowthescope,againlookintoconstructiondiagrampapertoalsomatchtorequestconcerningthenorm.Owingtoabove-mentionedcircumstance,passbyhardanalytical,theconfirmationcrackreasonhasthefollowingwhattime:1,causenowmainreasonofsprinklingtheplankcrackistheconstringencyofcon
7、crete,theconcreteisinthenaturethehardeningtheprocess,becausewaterevaporatescontinuously,butthephysicalvolumegradualconstringency,buttheplankisonallsidestobesubjectedtoastipulationof,can'tflexfreely,sowhentheconstringencyofconcretecausetosprinkleknotholestipulationnowshoul
