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河南产业园安置区混凝土施工技术交底

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技术交底记录编号工程名称中牟绿博文化产业园区绿博3号安置区施工单位中国建筑一局(集团)有限公司交底提要:混凝土施工技术交底交底时间:2015年5月6日交底内容:1.图纸设计混凝土强度等级:混凝土强度等级表:部位混凝土强度备注CFG桩C20基础垫层C15基础底板、梁、筏板C35P6地下室外墙C35P6主楼基础顶~13.320C35各楼层高度不同,混凝土标号变化层标高不同,实际施工时以各楼具体设计为准13.320以上C30构造柱、圈梁、现浇过梁、压顶梁C25地下室基础底板、地下室外围墙柱、外扩地下室顶部的梁板均为防水砼,抗渗等级为P6。地下室基础底板及外围挡土墙砼采用低收缩混凝土材料,并掺入高性能抗裂防水剂。构造柱、圈梁、现浇过梁及压顶梁均为C25;选用标准图的构件按标准图要求,并不得低于C25。选用标准图的构件按标准图要求,并不得低于C25采用高一强度等级的填充用膨胀混凝土浇筑2.混凝土施工工艺:(1)混凝土原材料控制:坍落度:严格执行坍落度检测工作制度,如遇坍落度不符合要求的混凝土,将砼罐车退回,不予使用。qualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n凝结时间:初凝时间延长到6~8小时,终凝时间为10~12小时。(2)泵送混凝土:a)本工程砼为商品砼,为保证砼质量符合设计要求,满足施工需要,我司将派1名管理人员驻预拌厂负责监督搅拌过程,保证砼配合比及膨胀剂掺量符合设计要求。预拌厂派人来现场监督控制砼的坍落度。b)根据运输路线和运输时间,确定砼初凝时间为3h,施工时再根据现场实际情况通知砼预拌厂调整砼初凝时间。c)浇筑方式:本工程采用地泵结合汽车泵进行混凝土浇筑,在汽车泵扬程范围内采用52m汽车泵,其他区域采用HTB60地泵及混凝土布料机浇筑,塔吊辅助配合。同时,依据浇筑位置随时提前做好场地准备工作,保证混凝土浇筑的正常进行。(3)混凝土施工工艺:a)施工队技术人员配合现场测量工程师在墙、柱钢筋上必须抄出+0.5m标高控制线,并用红油漆划上红色三角做标记,并使用水准仪,对集水坑等标高重点控制,随时抄平,控制标高正确性拉线控制,刮杠找平标高。b)砼浇筑前先用砂浆湿润泵管。c)砼浇筑实行“浇筑令”制度,浇筑前对模板及其支架,钢筋和预埋件、预留洞口、插筋、位置和稳固情况进行检查,并作好记录,符合设计要求及规范要求,且经过业主、监理的隐蔽验收签字认可后方可浇筑砼。d)严禁在泵车料槽中加水,若混凝土失水影响泵送可适量加入相同配比的水泥浆(水泥浆采用同搅拌站的水泥拌制)。e)坍落度试验人员应及时按要求认真填好《坍落度记录表》,混凝土坍落度18±2cm。若坍落度过小应加入相同配比的水泥浆(水泥浆采用同搅拌站的水泥拌制)。试验人员必须检查现场混凝土坍落度情况,标记试件的部位、种类、养护龄期等。发现混凝土质量问题应及时的以最短时间通知工程部并协助工程部解决实际问题。f)qualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n在浇筑过程中,砼振捣是一个重要环节,一定要严格按操作规程操作,做到快插慢拨,快插是为了防止上层砼振实后而下层砼内气泡无法排出,慢拨是为了能使砼能填满棒所造成的空洞。在振捣过程中,振捣棒略上下抽动,使砼振捣密实,插点要均匀,插点之间距离宜控制在50cm,离开模板距离为20cm。采用单一的行列形式,不要与交错式混用,以免漏振,振捣点时间要掌握好,不要过长,也不要过短,一般控制在20~30s之间,直至砼表面泛浆,不出现气泡,砼不再下沉为止。g)每次移棒的水平距离不大于400mm,振动棒使用时,其不应紧靠模板振动,且应尽量避免碰撞钢筋、线管、预埋件等。h)砼表面用木搓子搓平,保证表面的密实度,减缓砼表面失水速度,防止表面龟裂。砼表面搓平稍待收水后,及时覆盖塑料薄膜及保温材料(草包或麻袋)。保温材料在砼内外温差及表面与大气最低温差均小于20℃时,方可拆除。(4)梁、板混凝土浇筑:浇筑前先在楼板上搭设人行栈道,其浇筑方法由一端开始用“赶浆法”即先浇筑梁,根据梁高分层浇筑成阶梯形,当达到板底位置时再与板的砼一起浇筑,随着阶梯形不断延伸,梁板混凝土浇筑连续向前进行。浇筑与振捣必须紧密配合,第一层下料慢些,梁底充分振实后再下第二层料,保持水泥浆沿梁底包裹石子向前推进,每层均应振实后再下料,梁底及梁帮部位要注意振实,振捣时不得触动钢筋及预埋件。浇筑板混凝土的虚铺厚度应略大于板厚,用平板振捣器垂直浇筑方向来回拖动振捣,并用铁插尺检查混凝土厚度,振捣完毕后用木刮杠刮平,浇水后再用木抹子压平、压实。施工缝处或有预埋件及插筋处用木抹子抹平。浇筑板砼时不允许用振捣棒铺摊砼。梁柱节点混凝土强度等级与下柱相同。(5)剪力墙混凝土浇筑:采用地泵或汽车泵及布料杆浇筑。先浇筑外墙,后浇筑内墙和柱。浇筑前先将模板底部与下部混凝土之间用密封条贴牢,下口用砂浆封堵,混凝土入模前墙根部洒水湿润,浇筑30-50mm厚与砼同配比砂浆。混凝土浇筑时要特别注意控制分层厚度和振捣质量,下料时用标尺杆控制分层厚度(夜间施工时用手把灯照亮模板内壁),每层砼厚度不超过50cm(即不超过本工程所使用的φ50振捣棒有效长度38cm的1.25倍,本工程取50cm以方便操作)。每一振点的延续时间为表面呈现浮浆和不再沉落、不再上冒气泡,即可认为振捣时间适宜。振捣棒移动间距为40cm,呈梅花形跳跃式前进,为使上下层混凝土结合成整体,上层砼振捣要在下层砼初凝之前进行,并要求振捣棒插入下层砼5—10cm。振捣时注意钢筋密集及洞口部位。墙体砼一次浇筑到梁底(或板底)以上4cm(待拆模后,剔凿掉2cm,使之漏出石子)。墙上口找平:墙体砼浇筑完后,将上口甩出的钢筋加以整理,用木抹子按标高线添减砼,将墙上表面砼找平,高低差控制在10mmqualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n以内。为了避免产生冷缝,墙体砼浇筑时,沿着墙体的高度方向成阶梯形向前浇筑,墙体的浇筑范围要根据砼的初凝时间确定,前一层浇筑范围不得过大,后一层混凝土浇筑必须在前一层混凝土初凝前进行,以免产生冷缝。(6)框架柱混凝土浇筑:柱混凝土浇筑前,先在底部浇以与混凝土配合比相同的水泥砂浆30-50mm,然后再浇筑混凝土。混凝土分层浇筑时,要制作分层标尺杆控制混凝土的分层下料厚度,分层浇筑厚度取250mm左右。为了避免发生离析现象,当混凝土自高处倾落时其自由倾落高度不应超过2米;当超过2米时,采用导管下料。混凝土振捣采用插入式振捣棒,分层浇筑时,振捣棒应插入下层50mm,以消除两层间的接缝。振捣过程以混凝土浆上浮,石子下沉,不出现气泡为合适。(7)大体积混凝土浇筑:本工程主楼部分为筏板基础,筏板厚度为1.0m、1.2m、1.40m。车库防水板厚500mm,主楼筏板基础属于大体积混凝土,筏板混凝土强度为C35,抗渗等级为P6,该工程大体积混凝土采用集中搅拌站供应商品混凝土,搅拌车运到现场,由混凝土泵车泵送入模浇筑。浇筑难度较大。a)混凝土输送:采用泵送工艺混凝土泵送前坍落度一般不应低于18cm。考虑道路阻塞等意外情况或因素,每一辆混凝土运输车上携带一桶高效减水剂,以便需要时由现场技术人员对混凝土的坍落度进行小范围的调整。b)混凝土浇筑:为避免混凝土产生内部收缩裂缝,底板混凝土应采取分层分段浇筑。根据整体性要求,结构大小,钢筋疏密,砼供应等具体情况,本工程采用斜面分层,连续浇筑即按照“一个坡度、分层浇筑、循序渐进”的方法实施,此方法既可方便振捣又可利用混凝土层面散热,对降低大体积混凝土的温度有利,斜面分层厚度控制在250~300mm,不宜过厚,保证下层混凝土在初凝之前被上层混凝土覆盖,振捣顺序延混凝土流淌方向赶振。c)混凝土振捣:在浇筑时,振捣棒移动间距应小于500mm,每一振捣的连续时间以表面出现浮浆和不再沉落为准。同时振捣器应插入下层混凝土5CM,注意整个振捣过程中不要振模振筋,不得碰撞各种埋件、铁件、止水带等,为确保混凝土的密实性,振动棒的操作应做到“快插慢拔”,不漏振,不过振。当砼浇筑到最后离边模板5m左右时,应将布料管转移到边模板处,使砼从边缘向中间浇筑,不使浮浆、砂浆集聚在边模板处。浇筑砼每振捣完一段,应用平板振动器压振一遍,并用长刮尺按标高刮平,用铁抹子拍压,木抹子搓平。qualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n大流动性混凝土在浇筑、振捣过程中,上涌的泌水和浮浆顺混凝土坡面下流到坑底。在混凝土垫层在施工时,预先在横向上做出2cm的坡度,使大部分泌水顺垫层坡度通过两侧模板底部预留孔排出坑外。当混凝土大坡面的坡脚接近顶端模板时,改变混凝土浇筑方向,即从顶端往回浇筑,与原斜坡相交成一个集水坑,另外有意识地加强两侧模板处的混凝土浇筑强度,这样集水坑逐步在中间缩小成小水潭,用软轴泵及时排除。采用这种方法排除最后阶段的所有泌水。d)混凝土测温与养护:浇筑前,按简易测温法,布设预埋导线测温点,对温度变化进行监控,发现温度变化超标,及时调整保温材料。地下室底板浇筑完后,采用蓄热法养护。砼振捣完毕并刮平后应在终凝前采用塑料膜密封覆盖,防止砼脱水龟裂,然后加盖保温材料从而有效地控制砼内部和表面的温差,以及砼表面和大气的温差,将内外温差控制在25℃以内,且保持不少于一周湿润养护,防止砼因温差应力而产生的裂缝。保温材料的拆除时间应以砼内部和表面温差以及表面和大气的温差远小于25℃为准。一般砼浇筑完毕,第三、四天为升温的高峰,其后逐渐降温,保温材料的拆除一般为14d以后,但仍应以测温结果和同条件养护试块试压结果为准。降温速度不宜过快,以防降温差应力产生裂缝。(8)后浇带施工:1)温度后浇带:温度后浇带两侧混凝土完工两个月后,用比两侧设计等级高一级的微膨胀混凝土浇筑。浇筑前一天将后浇带两侧的混凝土表面凿毛,清除后浇带中的垃圾、已浇筑混凝土两侧的水泥薄膜、浮锈等,同时将混凝土凿毛,用水冲洗干净。后浇带两边2m范围内用草席盖湿润一昼夜以上;浇筑后应加强养护工作,用草席麻包遮盖湿润养护14天以上。2)沉降后浇带沉降后浇带待主楼封顶后根据沉降观测结果由设计单位确定,但最早不得少于60天。普通后浇带应在两侧混凝土浇筑两个月后浇筑。后浇带两侧应支撑牢固防止变形改变结构受力特征。后浇带浇筑时两侧的混凝土表面应凿毛并清理干净,采用高一强度等级的填充用膨胀混凝土浇筑(外加剂应满足《混凝土外加剂应用技术规范GB50119-2013》,浇筑时温度宜低于主体浇筑混凝土时的温度,并覆盖养护。qualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n3.混凝土裂缝防止措施:(1)合理分区,按照施工规范要求对较大区域施工合理留施工缝,施工缝按规范要求处理。地下室、各梁板砼结构的按施工图纸留设施工缝,地面变形缝应留设在室内隔墙处建筑地面分隔处。(2)水泥采用中、低水化热,干缩小的普通硅酸盐水泥。(3)用坚固性良好,细度模数大于2.6,含泥量小于3%的中粗砂。(4)选用坚固性良好,针片状含量<15%,含泥量<1%的连续级配石子。(5)掺入高效减水剂,微膨胀剂和适量粉煤灰,优化混凝土配合比,在满足强度和易性要求下,减少水泥和水用量,水灰比控制在0.5以内,坍落度在满足泵送条件下取16-18cm。(6)合理组织混凝土的供应,缩短混凝土运输时间,到达现场时往罐体上喷水,及时卸料,气温较高时输送泵料斗搭防晒棚,泵管全程裹湿麻袋,降低混凝土入模温度。(7)充分做好混凝土配合比试配优化技术工作,经多组试配,通过抗压强度试验,调整优化,确定配合比。(8)及时做好已浇筑混凝土的养护工作。4.混凝土质量保证措施:(1)混凝土配合比应经试验合格后才能投入使用。混凝土必须加强养护(包括有足够的时间和有效的措施)。(2)防水混凝土使用的水泥,应符合下列规定:水泥的强度等级不应低于32.5MPa,宜采用普通硅酸盐水泥、硅酸盐水泥,采用其他品种水泥时应经试验确定;不得使用过期或受潮结块的水泥,不得将不同品种或强度等级的水泥混合使用。(3)防水混凝土所用的砂、石应符合下列规定:石子最大粒径不宜大于40mm,泵送时其最大粒径应为输送管径的1/4;吸水率不应大于1.5%;不得使用碱活性骨料。其它要求应符合《普通混凝土用砂、石质量及检验方法标准》(JGJ52-2006)的规定;砂宜采用中砂,其要求应符合《普通混凝土用砂、石质量及检验方法标准》(JGJ52-2006)的规定。(4)防水混凝土可掺入一定数量的粉煤灰、磨细矿渣粉、硅粉等,粉煤灰的级别不应低于二级,掺量不宜大于20%;硅粉掺量不应大于3%;其它掺合料的掺量应经过试验确定。(5)每立方米防水混凝土中各类材料的总碱量不得大于3kgqualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n(6)防水混凝土的配合比,应符合下列规定:水泥用量不得小于320kg/m3;掺有活性掺合料时,水泥用量不得少于280kg/m3;砂率宜为35%~40%,泵送时可增至45%;灰砂比宜为1:1.5~1:2.5;水胶比不得大于0.50;普通防水混凝土坍落度不宜大于150mm.防水混凝土采用预拌混凝土时,入泵坍落度宜控制在120mm~160mm,入泵前坍落度每小时损失值不应大于20mm,坍落度总损失值不应大于40mm;掺加引气剂或引气型减水剂时,混凝土含气量应控制在3%~5%;(7)防水混凝土拌和物在运输后如出现离析,必须进行二次搅拌。当坍落度损失不能满足施工要求时,应加入原水灰比的水泥浆或二次掺加减水剂进行搅拌,严禁直接加水。(8)防水混凝土终凝以后应立即进行养护,养护时间不得少于14d。(9)混凝土的冬期施工,应符合下列规定:混凝土入模温度不应低于5℃;应用综合蓄热法等养护方法,并应保持混凝土表面湿润,防止混凝土早期脱水;当采用掺化学外加剂方法施工时,应采取保温措施。(10)浇筑混凝土之前,一定要将模板浇水湿透。浇筑好的混凝土养护工作要得到高度重视,要在混凝土初凝后,及时得到养护,用草包覆盖,并浇水养护,避免混凝土表面水分蒸发过快,使混凝土表面发生开裂。认真做好混凝土养护工作,混凝土浇捣前必须使木模吸足水分,遇到面积较大时,要用草包加以覆盖,并浇水保持混凝土湿润。一般养护时间:采用硅酸盐水泥、普通硅酸盐水泥和矿渣硅酸盐水泥拌制的混凝土,不得少于七天;掺加缓凝型外加剂及有抗渗性要求的混凝土,不得少于十四天。梁柱框架结构,应尽可能采取带模浇水养护,免受曝晒。 5.混凝土安全文明施工:(1)施工人员均需经过三级安全教育,进入现场必须戴好安全帽,系好安全带。(2)安全员及时检查,及时制止违章作业,消除隐患。(3)班组长对班组作业区的文明现场负责。坚持谁施工,谁清理,做到工完场清,下班前必须清理干净。(4)泵管架设的支架要牢固,转弯处必须设置井字式固定架。泵管转弯宜缓,接头密封要严。(5)泵车料斗内的砼应保持一定的高度,防止吸入空气造成堵管或管中气锤声和造成管尾甩伤人的现象。qualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou\n(6)浇捣砼操作,站在脚手架上操作,不得站在模板或支撑上操作,操作时戴绝缘手套、穿绝缘胶鞋。(7)砼振捣器作业运转时,电动机的导线必须有足够的长度和松度,严禁用电源线拖拉振捣器。(8)做好施工现场的排水和四周的清理工作,防止积水和淤泥。技术负责人交底人被交底人qualityegg,chicken,...Developmentofpoultryindustrywilloccupyacertainareaofland,thereisamodernproductwithcomprehensiverollupof50,000chickenslayinghens,coversanareaof14.87hectares(233acres)more(includingOfficeofhatching,broodrearing,andlayingHouse,eggs,feedprocessingworkshop,Office,etc).Thepoultryindustryshouldworkinlandconservation,notaccountedfororlesscultivatedland,wasteland,theprincipleofslopeland.Whenthechickenfarmshouldgenerallynotavailabletolocalarablelandareatodetermineanappropriatelevelofbreedingsizeandnot,asinthepast,firstdeterminethesize,thengototheexpropriation.3.energy-saving,water-savingawarenessinthe1970ofthe20thcentury,thepigandchickenfarmmechanizationinourcountryforwardundertheslogan,thecountrystartedbuildingamodernlargechickenfarmsintheclimax.Wasbuiltasthefullyenclosedintensivechickenfarms,usingartificiallight,mechanicalfeedingandmandatoryventilation,asmallnumberofchickenfarmsalsousemechanicalsetseggsandmanure.Accordingtostatistics,fullyenclosedchickencoopperchickenwhentheannualelectricityconsumptionof10-kilowatt•,halfopenedthehenhousewhen•2~5kW(open),whentheentireopeningis0.5kW•,rollingopenshedsat0.45kW•.Henhousetypes,powerconsumptiondifferenceisverybig,adifferenceof10~20.China'senergysupplyisinshortsupply.Therefore,indeterminingthebreeding,poultryequipmentselectionshouldtakefullconsiderationofenergysavingissues.LackoffreshwaterresourcesinChina,theaverageannualprecipitationis600mm.19882474cubicmetersofwaterpercapitainChina,only1/4ofthepopulationallovertheworld,nowreducedto2300cubicmeters.Hendailywaterintaketoabout1.5~2times,sowhenyou