h混凝土浇灌施工方案.doc
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1、yuan, an increase of 17.5%; local government general budget revenue of 500 million Yuan, . Painting, model culture creates new Ma Church community, creating Lake scenic spot culture education base, received high evaluation from provincial and municipal discipline Inspection Commission, the peoples d
2、aily special report. Constantly promote independent Commission against corruption culture construction to rural extends, created established Dahlin rural industry Park independent Commission against corruption culture positions, formed has a support service low double excellent of members lead team,
3、 constantly perfect and established Park funds assets management, and village audit supervision, and villagers democratic financial, system, strengthening Park party, and Chief, and financial, full public, powerful to guarantees has new rural construction, by city rural style clean government inspec
4、tion unit led of height evaluation. Through the implementation of honest and clean government cultural construction, and effectively educate the broad masses of party members and cadres and consciously regulated behavior and discipline, honesty in politics and culture to create a good atmosphere and
5、 fresh development environment. Although we in implement implementation independent Commission against corruption guidelines aspects made has must effectiveness, but away from superior of requirements also exists must of distance, main performance for: a is system enough sound, education, and superv
6、ision, and prevention, and punishment, aspects long-term mechanism also enough perfect, especially in enrollment bid work regulatory aspects also needed strengthening; II is regulatory supervision exists lost of Yu wide, and lost of Yu soft, investigation illegal disciplinary case of efforts also ne
7、eded strengthening, individual sector and cadres also different degree exists treat gift, not to benefits not do, and mess do of phenomenon; Three for honest work is the new situations and new problems in finding timely enough, treatment measures are not strong enough. To solve these problems, we wi
8、ll proceed from the following five aspects of rectification, make sure to implement the provisions of the code. (A) deepening the learning, enhance the consciousness of honesty in politics. To create event as an opportunity to Excel and learning party, further increasing the governance capability an
9、d advanced construction, reinforced rules of the broad masses of party members and cadres awareness, sense of responsibility, sense of honor, improve working ability and level of scientific development. Should make full use of meetings, in particular central group learning opportunity, further stren
10、gthening the study and education of the code, the intensive warning education, education the majority of party members and cadres known fear, knew fear, honesty in politics of tension the strings, consciousness and enhancing the implementation of the initiative. Also, pay attention to apply what the
11、y have learned, consciously study results into planning work, new ideas,目 录一、工程概况2二、施工流水段划分2三、混凝土浇灌平面布置2四、混凝土施工工艺21、 高程控制22、 模板检查、清洗33、混凝土浇注3五、质量保证措施 7六、安全防护措施7七、商品混凝土质量控制措施8八、文明施工措施9九、混凝土工程质量通病预防9D81标准厂房混凝土浇注施 工 方 案一、工程概况81地块标准厂房工程主体为五层钢筋混凝土框架结构,总高度27.85m。建筑承重构件为现浇钢筋砼梁、柱、楼板。其中一层柱为:C45,二层四层柱为:C40;五层
12、柱为:C35;屋面层、机房层、构架层柱:C30。二层屋面梁、板均为:C30。由于建设调整施工设计,地坪表面取消二次装修,混凝土表面采用原浆收光。其中底层层高6m,二五层层高为4.2m。二、施工流水段划分根据原施工段划分,按照平面位置分为四个段,即按照伸缩缝进行划分。但由于建设单位调整设计,把313轴线/AG轴线改为地车库,且方案未正式确定。因而前期施工段划分为两段,在JK轴之间留设施工缝,先行施工KQ轴线/113轴线结构混凝土。每段底层柱子砼约105m3,梁、板砼500m3;标准层柱子砼约66m3;梁、板砼500m3。计划一天一夜内完成混凝土的浇灌工作。混凝土浇灌方法采用一次性梁板柱浇灌的方法
13、施工。三、混凝土浇灌平面布置(如附图)四、混凝土施工工艺1、高程控制(1) 根据建设单位提供的控制水准点,用水准仪准确地引测到塔吊上,在楼层处作好标记,以此来控制楼面高程。(2) 根据楼层控制标高,把此标高引测量到各柱子钢筋上。一般情况下比完成面高10cm。(3) 在每块现浇板中间部位,使用同梁板标号的混凝土块,高度同楼板厚度的混凝土块来控制楼板表面高程。2、模板检查、清洗(1) 混凝土浇灌前模板内的垃圾派专人进行清捡,然后再对模板进行冲洗,浇灌混凝土前要对模板进行湿润。(2) 再次对模板支撑体系及模板拼缝进行检查,发现问题进行纠正。3、混凝土浇注混凝土工程全部使用商品混凝土。考虑采用混凝土泵
14、送施工技术,以保证施工混凝土的垂直运输。地下部分混凝土的运输采用汽车式混凝土输送泵及塔式起重机及拖式混凝土输送泵配合施工。地上部分,采用拖式混凝土输送泵及塔式起重机配合布料杆施工。由于混凝土标高有两种,混凝土具体浇灌时先浇灌柱子砼,然后再浇灌梁板砼。加之底层柱子较高,达到6米,柱子计划分三次进行浇灌,其他楼层柱子计划分两次浇灌,中间停歇时间约30min。(1)、混凝土施工设备选型:采用1台HBT80-16-110S拖式混凝土输送泵,电功率110kw,最大理论输出量80m3/h,最大泵送压力16MPa,最大垂直运距140m,混凝土输送泵输送管道主要采用3m长、直径125mm的直管和半径90cm长
15、、90的弯管连接而成。施工层采用一台HG12型混凝土布料杆进行布料,最大作业半径12m,施工时用塔吊吊至作业面,主要用于框架柱、梁和顶板混凝土浇筑。A 管路铺设:根据本工程和施工现场特点,为保证配管的稳定,本工程地上部分采用在结构内布管的形式。混凝土输送管采用管径125mm,设在建筑物内垂直布至施工层,进施工层后水平向东、西两侧延伸直至操作面,甩出弯管,连接布料杆。本建筑物最大高度近30m,水平管布设15m,所以,水平管和立管长度之比为15/30=1/21/4,满足规范要求。B 水平管铺设:楼下地面水平管选用钢筋及角钢做的固定卡具,在管道连接处固定牢靠。楼上水平管用125mm无缝钢管,水平方向
16、在接头处用木方将管道水平支垫牢固。(2)、混凝土的泵送A 混凝土泵送前的准备工作a 检查泵与设置处是否坚实可靠,为防止泵倾覆,需将外伸腿支承于坚实处,并加垫木以扩大其支承面积。b 检查混凝土泵的受料斗和输送管线,是否有混凝土的附着物堵塞。c 在正式泵送混凝土之前,对输送管道和泵体加水湿润,并首先泵送2m3 左右水泥砂浆,以润滑其管道。d 在混凝土泵送前应对其先做坍落度试验,在任何情况下都不准向混凝土拌合物中任意加水以增加其坍落度,如发现其坍落度过大或混凝土异常,应及时将其退回混凝土搅拌站。B 混凝土泵送时应注意事项a正常泵送应连续进行,尽量避免泵送中断。泵送中断时间控制在1h 以内。中断时间超
17、过30min,或出现异常情况时,混凝土泵应间隙进行推动,每隔45min 开泵一次,每次使泵正转和反转抽动两个冲程,防止输送管内拌合物离析和凝结。同时,开动存料斗中的搅拌器,以防止混凝土离析。b 泵送混凝土过程中应派专人巡察泵送管线,如发现有泵管脱落破裂等情况,应及时停止泵送,进行修复。(3)、混凝土的浇注和振捣混凝土待钢筋绑扎完毕,模板支设完毕并加固牢固,预埋、预留准确后,填写混凝土浇灌申请表,请各专业工长签字同意并经监理公司检查认可后才许浇灌。浇注前,及时查询天气预报,便于提前做好针对性的防雨、防风等措施,与有关部门建立良好的协作关系,保证道路畅通,水、电供应正常。在施工现场内设专人负责指挥
18、调度,做到不待料、不压车、工作上有序作业。首先浇注柱子砼,为防止混凝土的离析,采用分层浇注的方法,每次浇注高度不超过1m,特别要加强钢筋较密处的振捣。每一根柱浇筑完成后,再浇注下一根柱,以四根柱子为一个小单位进行浇灌,然后浇注梁板砼,依次类推。由于柱、梁板混凝土强度不同,可按照下图进行施工。楼板先用插入式振捣器振捣后,用平板振动器振捣,再用木刮尺刮平,浇完后23h 用木抹子将混凝土表面反复压两遍,铁板收光,使混凝土表面密实、平整。混凝土振捣时,振动棒交错有序,快插慢拔,不漏振,也不过振,振动时间控制在2030s。振捣时间以表面混凝土不再显著下沉,不再出现气泡,表面泛起灰浆为准。在有间歇时间差的
19、混凝土界面处,为使上、下层混凝土结合成整体,振动器应插入下层混凝土5cm。振动棒插点要均匀排列,采用“行列式”或“交错式”的次序(不能混用),每次移动位置的距离控制在500mm 左右。浇注混凝土时,应留木工和架子工看守模板和支架,发现问题及时处理。(4)、施工缝的施工施工缝的留设:一般柱的施工缝留设在板顶面,梁、板一般留设在跨中1/3部位。施工缝处理:先将结合面混凝土凿毛并清渣,新浇混凝土时再将结合面湿润并铺一层与新浇混凝土同配合比的砂浆,然后进行新浇混凝土施工,保证新旧混凝土结合良好。(5)、混凝土的养护混凝土的养护采用洒水养护,混凝土养护期不少于14d。(6)、清水混凝土的修补混凝土出现质
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