f保证底框结构砼浇灌质量的专项施工方案.doc

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1、the principle of simplified EIA of construction projects in the region. In terms of land, linked to the implementation of urban and rural construction land increase and decrease, replacement indicators for priority areas project. Charges, into the projects of water, electricity, administrative charg

2、es and preferential policies. In the area of taxation, and settled in areas of industry and its production company, within 5 years after the completion of fiscal incentives to enterprises. In terms of financing, integration of land, tax, financial and other resources, and construct Government credit

3、 + business credit credit system, establishment of marketization, commercialization and modernization of the investment and financing platform; effective Bank-enterprise docking, encourages private capital into the Park, to raise industry development fund. 5, optimize the environment and service ind

4、ustries. To create policy lowlands, Highlands, integrity of service land, development land as the goal, to optimize the area under development environment. All administrative law enforcement departments to appoint a full-time personnel stationed in areas dedicated to coordinating and solving problem

5、s associated with businesses in this sector. When there are substantial issues, sector leaders arranged to personally intervene, in-person, in-person push tangible area building a green light, easy line. To further reduce and standardize administrative examination and approval items, simplify examin

6、ation and approval links, improve efficiency; according to the .Since the educational practice of the mass line of the party, himself seriously in the education, practical control central eight rules and opposing the four winds and practicing three Suns, and check the spirit of Jiao Yulu, ideology,

7、solicit opinions based on outstanding problems checked swing, careful analysis and reflection. Will now check report is as follows: first, adherence to the partys political discipline, eight in the central provision, change the style of the basic situation of 1, in compliance with the partys politic

8、al disciplines. Conscientiously abide by the partys political discipline, abide by the Constitution and the rules and regulations of the party, in the political, ideological and maintain highly consistent with the CPC Central Committee on the action, there is no violation of the partys political dis

9、cipline problems. 2, in the implementation of the central authorities of the eight provisions. Improving research, improving research methods, but there are less grass-roots units, primary first-hand an inadequate grasp of the problem, which is to be strengthened in the future. Second, construction,

10、 strictly in accordance with the provisions to streamline and improve the quality of meetings of the Conference. Third, streamlining file briefs, culture involves all aspects of propaganda and ideology, sometimes due to the practical needs of invention notifications, this area needs further保证底框结构砼浇灌

11、质量专项施工方案由贵阳信民房地产开发有限公司开发,重庆龙珠建筑工程有限公司承建的惠农巷商住楼(一期)1、2、3#楼5.20m层为钢筋混凝土现浇框支柱、梁、板。混凝土强度等级为C40,为确保C40砼浇灌质量特制定本方案。一、执行规范和强制性条文标准:1、混凝土结构工程施工质量验收规范GB5020420022、建筑工程施工质量验收统一标准GB5006820013、普通混凝土配合比设计规程JGJ5520004、普通混凝土用砂质量标准及检验方法JGJ52925、普通混凝土用碎石卵石质量标准及检验方法JGJ53926、混凝土外加剂应用技术规范GBJ11988二、施工准备(一)技术准备:1、现场施工人员应

12、熟悉图纸,并提出材料需用计划。2、对原材料供货单位进行考察,签定物质供应合同。3、选好砂石供应场所,进行定点使用,若变更场所应重新取样做试配。4、施工前应对计量、工具进行检查、校核,对搅拌机振捣器,运输设备等机具应进行试运转,待符合要求后方可使用。5、对水源、电源及运输道路等,除检查其保证正常使用外,尚应进行安全检查,凡不符合安全要求的不应施工。6、施工期间应设专人与气象部门联系及时掌握天气变化情况,根据季节施工特点和工程需要,备好所必须的抽水设备防雨、防滑、防寒等物资,以保证施工过程的顺利进行,确保砼质量。(二)主要施工机具设备砼搅拌机采用强制式搅拌机。计量设备采用磅称计量设备,水计量采用流

13、量计,时间继电器,控制,上料设备采用双轮手推车,砂石输入料斗等并在手推车上作好用料标志(采用油漆或用钢筋电焊在用料高度上),以及配套的其它设备,现场试验器具,如坍落度测试设备、试模等。(三)作业条件1、试验室已下达砼配合比通知单,结合现场实际情况将其转换为每盘,使用的施工配合比,公布于搅拌配料地点的标牌上。2、所有原材料经检查,应全部符合配合比通知单所提出的要求。3、搅拌机及其配套的设备应运转灵活、安全可靠,电源及配电系统符合要求,安全可靠。4、所有计量器具必须有检定的有效期限标识,磅称下面及周边的砂、石清理干净,计量器具灵敏可靠,并按施工配合比设专人定磅。5、管理人员向作业班组进行配合比,操

14、作规程和安全技术交底。6、需浇筑砼的工程部位应办理隐蔽、预检手续,砼浇筑的申请应由监理人员的批准。7、新下达的砼配合比,应进行开盘鉴定,但必须符合施工要求。(四)操作工艺。砂石计量砂计量水泥计量水计量外加剂计量上料斗搅拌筒搅拌出 料搅合物和易性检查坍落度检查质量检查运 输运 输制作试块浇 筑振 捣养 护(五)施工操作要点1、每台班开始前,对搅拌机及上料设备进行检查并试运转,对所用计量器具进行检查定磅;校对施工配合比,对所用原材料的规格、品种、产地、牌号及质量进行检查,并与施工配合比进行核对;对砂、石的含水率进行检查,如有变化,及时通知试验人员调整用水量,一切符合要求后,方可开盘拌制砼。2、计量

15、(1)砂石计量,用手推车上料时,必须车车过磅,卸多补少,或在手推车上作计量标记,以确保计量准确。(2)外加剂及混合料计量,对粉状的外加剂和混合料,应按施工配合比每盘的用料计量。(3)装料顺序其顺为石子 水泥 砂子 外加剂,每盘装料数量不得起过搅拌筒标准容量的10%。(4)出料搅拌好的砼要做到基本卸尽。在全部砼卸出之前不得再投入拌合物,更不得采用边出料边进料的方法。三、原材料:1、水泥:水泥使用贵阳金龙水泥厂生产的42.5级普通硅酸盐水泥。水泥进场时,指定专人验收其品种、级别、出厂日期、质量证明书,37天强度检验报告等进行检查,并对其强度、安定性及其它必要的性能指标进行复验。对水泥质量有怀疑或水

16、泥出厂超过三个月时,必须进行复检,并按复验结果使用,其质量必须符合硅酸盐、普通硅酸盐水泥GB175的规定。严禁使用含氧化物的水泥。2、砂:山砂使用贵阳小烂塘厂生产的五眼砂,使用前按产地、品种、规格、批量取样试验,内容包括颗粒级配,密度(比重)表面密度(容重)、含泥量等,砂的含泥量不得超过3%,含水率不得超过3%必要时可采用化学法和砂浆长度法进行集料的碱活性检验。3、碎石:碎石使用贵阳永富砂石厂生产的14cm碎石的同规格的粒径,最大粒径不得大于结构截面最小尺寸的1/4,同时不得大于钢筋间距最小净距的3/4,总而言之:对砂、石骨料的要求是高品质,高强度、物理化学性能稳定,不含有机杂质的粗、细骨料。

17、4、水:使用饮用水,并应符合国家现行砼拌合用水标准的规定。5、外加剂:外加剂使用河南省的减水剂,掺量0.31%,减水剂易与水泥混淆在使用时必须设置明显标志,严防混淆误用,造成混凝土质量事故。四、混凝土配合比:C40混凝土配合比按贵州鑫建建设工程检测有限责任公司出具C40混凝土配合比报告执行重量比为:1:1.42:2.42:0.41=水泥:砂:碎石:水每M3材料用量为:42.5级水泥: 463kg五 眼 砂: 661kg14cm碎石: 1125kg饮 用 水: 190kg每盘材料用量为:42.5级水泥: 100kg五 眼 砂: 142kg14cm碎石: 242kg饮 用 水: 41kg施工搅拌混

18、凝土时,项目部指派专人负责测定砂石含水率,根据测试结果调整材料用量,提出施工配合比并按重量计量,每盘材料必须过称,原材料每盘称量的允许偏差为2%以内,另监督检查混凝土的水灰比,坍落度、外加剂的掺合量以及混凝土的搅拌时间等。五、用于检查结构构件混凝土强度的试件:混凝土的强度等级必须保证C40的要求,用于检查C40混凝土强度的试件,由监理工程师监督在混凝土浇筑地点随机抽样,取样数量每拌制100盘且不超过100M3的同一配合比混凝土取样一次,每工作班拌制的同一配合比的混凝土,不足100盘时,取样一次,每次取样至少留置一组标准养护试件,同条件养护试件。六、混凝土施工:混凝土施工包括配料、搅拌、运输、浇

19、筑、养护拆模等全过程,其工艺流程均相互联系和相互影响在施工过程中任一过程处理不当都会影响到混凝土工程的最终质量。1、混凝土的施工配料:(1)5.20m层框架结构混凝土设计强度等级为C40。(2)贵州鑫建建设工程检测有限公司出具的C40配合比报告每M3材料用量为:42.5级水泥: 463kg五 眼 砂: 661kg14cm碎石: 1125kg饮 用 水: 190kg用砂率37%,水灰比0.41,坍落度6.5cm。(3)施工现场配制的每盘材料用量为:42.5级水泥: 100kg五 眼 砂: 142kg14cm碎石: 242kg饮 用 水: 41kg减水剂0.31.0%。(4)配制C40混凝土用的水

20、泥为贵阳金龙水泥厂生产的42.5级普通硅酸盐水泥,减水剂使用河南。2、混凝土搅拌(1)该工地因场地狭窄,道路交通阻塞,无法使用商品砼,经申请为自拌砼,用于搅拌混凝土的机械设备为JDY350D型强制性混凝土搅拌机。(2)搅拌混凝土前,严格按照试验室提供的配合比过称计量,量差不超过水泥2%,粗细骨料3%,水2%。(3)搅拌时混凝土的投料方式:在搅拌机上料斗中,先装碎石、再装水泥、最后装砂,砂压住水泥,不致水泥四处飞扬,然后一次投入搅拌机筒内,在加水搅拌。(4)混凝土搅拌时间:自原材料装入搅拌筒中起至卸料时止,搅拌的最短时间为2分钟,但必须保证各种材料混合均匀,颜色一致和易性好。(5)混凝土搅拌时,

21、用砂率按37%,水灰比按0.41、坍落度按6.5cm计算。3、混凝土运输:(1)混凝土的运输采用水平和垂直运输,水平运输的工具为手推车,手推车的容量为0.070.1M3,载重量约200kg,主要用于地面和楼面的水平运输。(2)垂直运输设备采用物料提升机,配合双轮手推车运送混凝土。(3)楼面运输跑道采用铁马凳与钢筋层架空,高度约20cm上铺40mm厚木板,宽度1.80m左右运输车辆及操作人员不至于踩踏钢筋,并边浇注边拆除。(4)运输途中尽可能道路平坦,尽量减少转运次数,保持混凝土的均匀性,不产生严重离折现象,否则浇注后容量产生蜂窝麻面。(5)运输时间要保证混凝土在初凝前浇入模板内,不得停留太长。

22、4、混凝土浇捣:1)混凝土的浇灌顺序,混凝土的浇灌顺序为先浇框架柱,挡土墙、剪力墙墙板,框架柱浇至梁底标高,挡土墙、剪力墙分二次浇灌到梁底标高,第一次浇灌2M以内每隔一个半小时浇灌一次,依次巡回,轮流浇灌至梁底以减轻模板的侧压力。2)柱、墙浇灌完毕,混凝土早期强度达到75%后,拆除柱墙模板,然后支梁、板模板,绑扎钢筋、浇灌梁、板混凝土,浇灌梁、板混凝土时,按方格网为序,一个方格网、一个方格网浇完,每个方格网内,先浇大梁,后浇次梁,在浇板,以此类推。3)施工缝的留置:施工缝留在结构受剪力较小的部位,柱、墙施工缝留置在基础顶面,梁的下面,只准留水平缝,不准留垂直缝,梁、板留垂直缝,本层结构要求梁、

23、板一次连续浇灌完毕,不留施工缝,如必须间歇,间歇时间尽量缩短,并在前层混凝土凝结之前,将次层混凝土浇灌完毕,如必须留施工缝,梁板施工缝留在跨中1/3处,只留垂直缝,不准留水平缝和板连成整体的大断面梁,只能留在板底2030mm处的水平缝,当板下有梁托时留在梁托下部。4)施工缝的处理:在已硬化的混凝土表面上,清除水溥膜和松动石子或软混凝土层,并加以充分润湿和冲洗干净,不得积水在浇二次混凝土前施工缝处铺一层1015mm厚,1:0.4的水泥浆或与混凝土成为相同的水泥砂浆一层。5)混凝土振捣,混凝土浇入模板以后是很疏松的里面含有5%20%的空隙和气泡,为了使混凝土成型密实必须使用插入式振动棒进行振捣,插

24、入式振动棒的振动捣方法有两种,一是垂直振捣,即振动棒与混凝土表面垂直,二是斜向振捣,即振动棒与混凝土表面成4050的角度。振捣时,振动棒不要碰撞钢筋和模板,插入深度不要过深,每一插点要掌握好振动时间,振捣时间过短,则不能使混凝土捣实,过长则使混凝土产生离折,即石子下沉,水泥浆上浮,一般情况下,每插一点约2030S,最短不少于10S,适合的振捣时间,可从下列现象判断:混凝土不再显著下沉;不再出现气泡;混凝土表面呈水平并出现水泥浆;由于振动棒下部的振幅要比上部大得多,因此每插点在振捣时应将振动棒上、下抽动510cm,使每层混凝土上、下,振动均匀结合密实。振动棒插入混凝土时要快,拔出时间要慢,“快插

25、”是为防止先将混凝土表面捣实,与下面混凝土产生离折,“慢拔”是为了填满因振动棒拔出而形成的空洞。主次梁、柱交叉点,钢筋密集处用30mm直径的振动棒振捣或用0.520cm的细石砼浇灌。5、混凝土的养护:目前、养护混凝土的方法主要有自然养护和蒸气养护两种,现浇构件多用自然养护现场混凝土浇灌完毕后必须于12h以内加以覆盖物浇水养护,浇水养护不得少于7昼夜,一般气温在15以上,在开始的3个昼夜中,白天每隔2h浇一次,夜间2次,每昼夜不得少于4次对于大面积的楼面板用草垫,锯屑或湿砂覆盖。6、混凝土表面缺陷的修补:1)面积较小且数量不多的蜂窝、麻面或露石的混凝土表面,其修整是先用钢丝刷或加压水冲洗基层,再

26、用1:21:2.5水泥砂浆填满,抹平加强养护2)面积较大的蜂窝、露石和露筋,按其全部凿去薄弱的混凝土层和个别突出的骨料颗粒,然后用钢丝刷或用压力水冲洗表面,再用细石混凝土(比原强度等级提高一级)填塞,并仔细捣实加强养护。3)影响结构性能的缺陷,如孔洞和大蜂窝等,面积超过0.3的缺陷,必须会同设计、监理和有关单位研究处理,不得隐瞒,自行处理。7、检查验收:1)轴线位移:尺量检查柱、墙、梁允许偏差8mm;2)标高:用水准仪或尺量检查层高,允许偏差10mm;3)截面尺寸:尺量检查柱、墙、梁、允许偏差+8 -5mm;4)柱、墙垂直度:用经伟仪线坠、尺量检查,允许偏差5mm;5)表面平整度:用水准仪或靠

27、尺检查,允许偏差8mm。惠农巷商住楼底框结构砼浇灌质量专项施工方案编制: 职务: 职称: 日期: 审核: 职务: 职称: 日期: 批准: 职务: 职称: 日期: 重庆龙珠建筑工程有限公司streamlining. Four are standard visits, except as required to participate in training, no other activity. Five is to improve news reporting, for propaganda work strictly according to the regulations. Six is

28、strictly your presentation published strictly according to the regulations. Seven is strictly thrift, required the use of vehicles and office space and corporate hospitality. 3, change the style. Propaganda and ideological work of the new situation and new requirements of the new tasks, had done a l

29、ot of fruitful work, has made many achievements, but further closer to the grass roots, close to reality, close to the masses and also inadequate innovation must continue to improve. Second, the four winds some outstanding issues 1, oppose formalism. One theory is that he didnt, with less close cont

30、act. Theoretical study of consciousness is not high enough, system performance is not strong enough; more passive learning, active learning few generalities and learn more, delving into less. Especially based on rational thinking on major issues, applying theory to guide the work done is not good en

31、ough, not really understand and grasp the spirit and essence of the scientific Outlook on development, did not truly achieve mastery, to apply, to a certain extent, affect the development and implementation of ideas and initiatives. Second, work arrangements, and less supervision. Propaganda and ide

32、ological work is the objective, which needs to keep the continuity efforts deployed, but stressed in the work time, less supervision. For example, color weekends in the summer theatrical activities, city square performances, urging townships, communities and rural areas shows the implementation is i

33、nadequate, insufficient cultural an educational role to play. Third base enough, master grass-less real. Propaganda and ideological work in the new situation of characteristics and regularity of enough, deep enough for grass-roots public opinion Dynamics survey, for grass-roots typically drive less.

34、 For example, rural culture team active, . Im not actively take the initiative to take up, the lack of spirit of daring to, resulting in some job had a lot of power, but no tangible results. Third, innovation, lack of motivation. Emancipation did not end, innovation does not exist. In practical work

35、, not your head, previous work experience, lack of innovation initiatives, study on the characteristics of propaganda and ideological work under the new situation through, grip on grassroots ideological trends and changes are not deep, to promote new initiatives and explore new methods of ideologica

36、l and cultural work is not much, and some lack of relevance and timeliness. 4, discipline, lowering, and hard work are lacking. While working and enterprising spirit down. No real solution to treat yourself right, correctly treat past honors, their complacency, and work to see their scores more, less checking his own shortcomings, like to listen to the praise, satisfied face, online promotion, there are typical, and lack of high standards and strict requirements, the effect is real. Second hard drive less. On hard and11

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