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1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流g华置广场凯旋门结构C50自密实混凝土施工组织方案.精品文档.文化宫华置广场凯旋门结构C50自密实混凝土施工组织方案批准： 审核： 编制： 编制单位： 中建商砼成都公司武侯站 编制日期： 2013年1月17日 中建商品混凝土成都有限公司1工程概况1.1工程建设概况文化宫华置广场工程项目位于四川省成都市太升南路地段，是一座集写字楼、超五星级酒店、高档住宅、商业区为一体的城市综合体建筑，地上塔楼四栋，分别为办公楼、酒店、住宅TC及住宅TD，其中两栋住宅共计53层，建筑高度194m，采用型钢混凝土剪力墙结构。表1.1 工程建设概况一览表工程名称文化
2、宫华置广场建设单位爱美高实业成都有限公司监理单位四川川建院项目工程管理有限公司设计单位/施工单位中建三局建设工程股份有限公司质量监督部门高新区质检站建筑面积（m2）763718工程主要功能、用途商务写字楼、高档公寓1.2结构概况华置广场两栋住宅楼TC与TD，高度187m，层数53层，在住宅塔楼38层至40层处设置大型悬挑转换钢桁架，悬挑长度约14至18m，该桁架将两栋住宅塔楼连在一起形成凯旋门样式，悬挑转换桁架上支撑13层结构层。悬挑支撑结构三维模型图如下所示：1.3混凝土概况凯旋门悬挑钢结构区域主要为斜杆钢管混凝土柱，采用C50自密实混凝土进行浇筑。根据设计要求需要浇筑混凝土的钢管混结构构件
3、共计五个，具体如下图所示：构件1：L38层柱内铸钢节点悬挑钢牛腿构件2：凯旋门L38-L39层斜杆，截面口10008006060构件3：L39层水平连接杆，截面为口6006003030构件4：L40层01号铸钢节点构件5：L41层04号铸钢节点根据浇筑区域可以划分为三部分进行浇筑，构件1、2、4为同一钢管混凝土斜撑部件，焊接完成后进行第一次浇筑，构件3水平杆件进行第二次浇筑，构件5为L41层铸钢节点进行第三次次浇筑。其中，构件3、5采用人工浇筑。构件1、2、4内部加强肋隔板较多，共计七道加劲肋，如采用普通由上至下重力进行浇筑，斜杆内空间较小，容易导致混凝土与空气混杂，形成混凝土空洞，质量难以保
4、证，因此计划采用斜杆底端侧面开顶升浇筑孔，由高压泵进行混凝土顶升工艺进行浇筑施工。混凝土概况如下表所示：表1.2 混凝土概况表序号强度等级方量施工部位特殊要求1C50自密实130m3凯旋门斜杆钢管混凝土柱自密实、无收缩、高层泵送、顶升1.4 施工重点及难点（1）主体结构悬挑结构混凝土的浇筑采用顶升工艺，这在普通建筑施工中难以遇到，且一般顶升工艺仅用于建筑底层结构，在超高层悬挑斜杆结构运较少，所以没有较为丰富的工程实践经验可以借鉴，在施工过程中对结构所采用的混凝土、顶升用地泵、泵管及具体的顶升措施都提出很高的要求。（2）钢管柱内混凝土的强度等级为C50，斜杆内需要一次浇筑成型，并且混凝土的最大浇
5、筑高度达148米，浇筑方向为斜向顶升，如何确定合适的混凝土配比以及顶升工艺也是整个工程的重点和难点。（3）受场地限制，地泵需要布置到场地内施工完毕的纯地下室顶板上，这就要求正确的选择布置地泵位置，使地泵、混凝土罐车工作时对已建结构尽可能小的造成影响。2. 施工部署2.1组织结构 本次混凝土供应站点为武侯站。武侯站成立了华置广场凯旋门结构C50自密实混凝土施工组织管理小组，全权负责本次C50自密实混凝土施工组织。表2.1 混凝土施工组织管理小组姓名职务职责范围联系电话刘刚组 长总协调13568851686王刚组 员生产施工管理13880237923李科研组 员现场、生产质量控制159281798
6、55张敏组 员材料组织13678001152王树生组 员前台服务组织135580853352.2原材料准备2.2.1原材料选择1）水泥根据成都市场情况，我站选用兰丰水泥厂生产的P.O42.5R水泥。本水泥也符合现行国家标准通用硅酸盐水泥（GB 175-2007）的要求。表2.2 兰丰P.O42.5R水泥技术指标细 度3d强度28d强度安定性初凝时间终凝时间5%293Mpa503Mpa合格185min245min2）拌合用水拌合物用水为地下水和自来水混合使用，经四川省地勘局成都岩土水质检验中心检定合格符合国家现行标准混凝土拌和用水标准（JGJ 63）的要求。3）掺合料粉煤灰选用宜宾级粉煤灰，该材
7、料符合国家现行标准用于水泥和混凝土的粉煤灰（GB/T 1596-2005）的要求。表2.3 级粉煤灰技术指标烧失量含水率需水量比细度5%1%95%12%硅灰选用重庆埃肻的密度为600Kg/m3的加密硅灰，其技术指标如下。表2.4 埃肯硅灰技术指标 型号SiO2含量(%)含水率(%)烧失量(%)7d活性指数45um筛余量(%)SF92923690%104）骨料选用新津的优质连续级配水洗骨料，其压碎指标、针片状含量、含泥量、泥块含量等指标均达到国家标准要求。 表2.5 新津碎石技术指标品种含泥量(%)泥块含量(%)针片状含量(%)压碎指标(%)空隙率(%)5-20mm0.501.04.039表2.
8、6 新津机砂技术指标石粉含量(%)MB值（g/kg）细度模数空隙率(%)50.82.83.0375）外加剂外加剂选用我司生产的自密实混凝土专用聚羧酸高性能减水剂，此产品减水率高，符合现行国家标准混凝土外加剂（GB 8076-2008）的要求， 表2.7 中建聚羧酸高性能减水剂技术指标 固含量减水率掺量20%-22%25%-28%1.6%-1.8%2.2.2原材料组织为了确保C50自密实混凝土的顺利浇注，我站召集供应商达成相关保供协议，保证贵项目施工期间的材料供应。清理1#线机砂仓，存储专用的5-20mm碎石，靠围墙堆放。4#机砂仓入场的自密实混凝土专用机砂在目测合格后方可卸料，严禁滴水砂入场。
9、材料科提前组织骨料入场，保证生产时含水稳定。具体材料进场、验收与储存见表2.8。表2.8 混凝土原材料组织与进场质量验收材料名称存储状态进场时间数量组织责任人质检责任人水泥9#罐提前1天组织进场300t张敏李科研机砂5#料仓提前2天组织进场1000t张敏李科研碎石6#料仓提前2天组织进场1000t张敏李科研粉煤灰6#罐提前2天组织进场120t张敏李科研外加剂1#站一次性组织进场2t张敏李科研硅灰/提前10天组织进场5t张敏李科研2.3机械设备准备2.3.1场外交通状况调查根据实地考察，我站车辆行驶主要路线为武侯站武青南路永康路晋阳路大石西路大石东路小南街华置项目，武侯站至该项目的运输距离约为1
10、2km，全程车辆较多、路况复杂，单程运输时间约为45min。具体路线如下图所示：2.3.2泵送设备的选择及布置根据本次凯旋门顶升混凝土浇筑高度位于L38层至L41层。浇筑高度为134.4m-148.8m，根据浇筑高度的要求，采用中联重科车载90泵可满足此高度顶升浇筑的要求。考虑到现场的整体布置和混凝土罐车的行进顺畅，车载泵布置于大墙东街以及三桂前街围墙外侧，混凝土运输车均停于街道边进行浇筑。泵车具体布置如下图所示： 2.3.3泵管的布置经过我站与项目多次考察，确定了本次浇筑的泵管布置方案，具体管线情况如下图所示：因施工工艺的特殊性，对泵管布置过程中细节方面要求较为严格，具体布置方案如下：（1）
11、止回阀的设置距离车载泵5m 处，设置一个止回阀，防止泵管内的混凝土回灌入泵车内。（2）38层楼面泵管的固定以及与钢斜撑的连接混凝土泵管连接到L38层以后接入楼层内的水平泵管，因考虑到高压泵送对顶升泵送接头的影响，因此在楼面上需要对泵管进行加固布置，防止因为震动而造成泵管脱落漏浆，顶升泵送失败。因此在38层楼板内布置泵管时候，泵管线路上植入6根25直径钢筋，然后采用40060010的钢板埋件板穿孔塞焊牢固，埋件板上焊接泵管卡，泵管卡距离地面250mm，每根直泵泵管采用两个泵管卡固定，弯头采用三个泵管卡固定。泵管卡采用12mm厚度钢板制作，卡住泵管后采用螺栓拧紧，空隙塞严实。同时因为泵管需要变方向
12、连接入凯旋门斜撑内，故在墙面上也需要制作一个墙面泵管卡进行固定，泵管变方向除采用普通90度、135度弯头外，对于地面转墙面上不规则角度弯头采用现场制作焊接牢固。（3）泵管与钢管斜撑的连接在靠近大斜撑底部铸钢件牛腿的位置开设一个进料孔，进料孔比进料泵管短管宽5mm。焊接的进料短管直径为内径125mm的无缝钢管（壁厚大于4mm），焊接时候进料短管与钢管斜撑呈45度的夹角向上状态，（4）泵管安装的要求高压泵管接头之间需要垫与泵管配套的橡胶圈，橡胶圈上抹黄油后，把橡胶圈压入橡胶圈槽中。高压泵管的接头处采用的是法兰连接，接管时比较麻烦。在安装法兰螺栓时，不能一次把一个螺栓拧紧，先把螺栓全部拧上，然后对称
13、拧紧螺栓。由于安装泵管接头处的法兰螺栓需要一定的空间，为了便于现场操作，水平管布置时管底离地面至少250mm，在布置竖向泵管时，避免泵管接头位置与楼板同一标高，用1m 和2m 长泵管调节，使接头位置设置在楼板面标高以上0.5 或楼板标高以下1m。 在泵管使用过程中，出现甭埋件与管卡焊接松动现象，要及时补焊，管卡螺丝松动，要及时拧紧。2.3.4生产设备检修、维护我站拥有一条HZS180生产线，两条条HZS120每小时最大理论产量可达到420 m3。由于顶升混凝土浇筑方量较小，且属于一次性浇筑，我站单线就完全能完成本次混凝土浇筑。为保障此次顶升混凝土施工顺利进行，除正常的设备保养外，我站将在生产前
14、对三台设备进行全面、彻底的检查、维护和保养。确保设备投入使用时正常运转。2.4技术准备根据试配情况，我站最终确定C50自密实混凝土配合比见下表。（单位：Kg/m3）表2.9 C50自密实混凝土配合比强度等级水水泥粉煤灰硅灰 砂 碎石减水剂C50自密实150300190309408208.3试配过程中混凝土拌合物的性能良好，基本达到预设指标。混凝土拌合物性能详见下表。表2.10 混凝土性能表强度等级出机性能3h性能标准试模强度（MPa）凝结时间（h）T/K（mm）倒T（s）T/K （mm）倒T（s）7d28d初凝终凝C50自密实270/6705.0250/6408.0/7163.混凝土生产3.1
15、计量站搅拌计量系统运行正常，每月、每周定期、不定期的对搅拌楼计量系统进行校核，收到了良好的成效。针对此次C50自密实混凝土生产，专门进行精确地计量系统校核，而且对每一车混凝土都做跟踪校核。3.2拌制混凝土搅拌过程是全过程微机操作，完全按照搅拌程序进行，并有相关人员进行监督，技术人员对混凝土搅拌时间有着严格的合理的控制。并对混凝土的施工性能严格把关，最大程度的满足混凝土的耐久性。3.3混凝土质量控制、检查3.3.1开盘时,搅拌站由试验室主任组织开盘鉴定，按照国家标准留置混凝土试件,检测混凝土坍落度以及损失,生产稳定后每车取样，确保混凝土质量的稳定。3.3.2质检员对混凝土拌制、运输与浇筑进行全过
16、程的监控 ，并作好前台交货验收及技术服务工作。3.3.3严格控制预拌混凝土水胶比1）严格监控原材料尤其是粗细骨料的质量。我站所用水泥、粉煤灰及外加剂均为成都地区品牌产品，质量相对较稳定。2） 混凝土运输车在每次装载混凝土之前放干净车内残留的洗车水。装有混凝土的运输车严禁再用水冲洗放料斗或往混凝土罐车内加生水，每车浇筑完毕后冲洗放料斗的水不得直接放入泵内，应当放入现场指定的斗车中，生产科负责监督检查，并制定相关的奖罚规定。3.3.4现场混凝土应具有良好的匀质性，满足自密实混凝土工作性能要求；4.混凝土运输混凝土从搅拌站采用混凝土搅拌运输车运输到施工现场。在运输过程中，考虑施工现场所处的地区易发生
17、堵车现象，因此要考虑混凝土的缓凝措施和途中失水的情况，而且要通过计算来确定所配备的运输车量台数，来确保混凝土浇筑过程要连续正常，避免出现在施工过程出现自然的施工缝。混凝土送到浇筑地点，如混凝土拌和物出现离析或分层现象，应对混凝土拌和物进行二次搅拌。同时，应检测其稠度，所测稠度应符合施工要求，其允许偏差值应符合有关标准的规定。 5.混凝土浇筑（1） 混凝土浇筑前，首先应当在楼面上断开泵管，采用水泥砂浆润湿泵管管道，水泥砂浆不得注入大斜撑之内。（2） 混凝土浇筑前，混凝土罐车应当将混凝土搅拌拌合均匀，喂料时候应当卸料均匀，且混凝土应当保持在集料斗的标志控制线上，避免空气进入泵管而产生引起的空气泵，
18、并由专人对混凝土的坍落度进行监测控制。（3） 浇筑前最后一次检查工作，确认截止阀处于打开状态，泵管与泵车的连接可靠，泵管支撑稳定，大斜撑上方专人监测。（4） 观察浇筑完成后至设计面以下30cm后，停止泵送顶升浇筑施工，稳压23min后检查是否临近斜撑顶端，关闭截止阀，停止泵送。（5） 采用塔吊配合，人工将大斜撑上部未灌注完成的30cm高度混凝土进行灌注完毕，并采用振捣棒将此部分混凝土进行振捣密实。（6）拆除泵管时，将斜撑处泵管短管切除，然后顶升口进行封闭。6.应急措施6.1现场浇注停顿应急预案根据顶升混凝土的特殊性，现场浇注停顿主要体现在堵管、堵泵（包括泵机故障）以及其他原因导致的施工停顿。针
19、对以上情况，制定了如下具体应对措施：6.1.1现场浇注停顿应对流程现场浇注停顿排查原因（堵管、爆管、浇注设备故障）塔吊，现场检修浇注恢复塔吊转为泵送。6.1.2现场浇注停顿应对方法1）如因现场堵管、爆管造成生产停顿，需要客服人员敦促施工方组织拆管、疏通。2）在混凝土浇筑过程中，对于泵机故障或堵泵现象比较轻微的情况下，泵工一般能够在半个小时内将问题解决并投入使用。3）在泵机故障或堵泵比较严重的情况下，采用塔吊的方式，由钢管上部灌入混凝土。（英文版 ） easily blame, to prevent the broken window effect. Supervise the leading
20、cadres to play an exemplary role, take the lead in the strict implementation of the and , lead to safeguard the solemnity and authority of the party discipline, ensure that the party discipline and the laws and regulations for implementation in place. Throughout the discipline in the daily supervisi
21、on and management, strengthen supervision and inspection, from the thorough investigation of violations of discipline behavior. Strengthen to key areas, key departments and key projects as well as the masses reflect the concentration of the units and departments for supervision. - strengthening supe
22、rvision, discipline inspection and supervision of cadres to set an example for compliance with the and is a man must be hexyl, blacksmith needs its own hardware. Discipline inspection organs as the executor of the party discipline, and supervisor of the defenders, for its supervision must be more st
23、rictly, discipline inspection and supervision of cadres to firmly establish the awareness of Party Constitution, sense of discipline and rules consciousness, politics loyalty, sense obey. Action speak Ji Ordinance to set an example of the regulations of the rule of law, strengthen supervision and ac
24、cept the supervision of the firmness and consciousness, do comply with and . To firmly establish the discipline must first be disciplined, the supervisor will be subject to the supervision of concept, and consciously safeguard and implement party compasses party, take the lead in practicing three st
25、rict real strict, so loyal, clean, play. To be good at learning, the Constitution and the as morality, politics and brought to fruition; to implement , do not want to, dare not, not with disciplinary ruler to supervision; to discipline a ruler, often the control inspection, and consciously in the id
26、eological red line to draw the row Ming Good accumulation is indeed the bottom line, so that the heart has fear, said to have quit, the line has ended. Attached: indifferent to heart, calmly to the table in our life, there are many unpredictable things will happen, some good, some bad things, we can
27、not control is powerless to stop, but with time, you will find in life sometimes turns out to be not good, some bad things finally turned out to be a good thing, but then we muddy however did not know, this is the life teach us things. 1, life can be complex, can also be simple. Want simple life of
28、precipitation, to have enough time to reflect, to make Become more perfect. Life is the most important thing is not to win, but the struggle; not to have conquered, but to have fought well. 2, the plain is the background of life. Live a plain life, give up on themselves is not a coward, but the wise
29、 answers; not disillusioned after the heart, such as ashes, but experience the storm after the enlightenment; not unrewarding perfunctorily, but calm attitude of life of unrestrained self-confidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of d
30、esire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ig
31、norance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrow-minded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract
32、trouble and worry, completely depends on how we look at and deal with it. Dont always take everything back to things, and dont get into a blind alley, dont want to face, dont be narrow-minded. Poke to care, is a kind of open-minded, a free and easy. 5, I am not afraid of others behind me a knife, I
33、afraid to look back and see stab me, is my intention to treat people; I am not afraid of the truth to tell the best friend, Im afraid he turned to it as a joke to tell dont 6, when we are in a positive frame of mind, you will find many good things; and when we are in a negative state of mind, you wi
34、ll find many depressed things; life happy and worry, all is you of life attitude, optimistic, good luck; loss of sink, Eritrea company. When you are in adversity, may wish to change a point of view to think everything over to the good Think, because good mentality decided the fate of the! 7, people
35、are tired, rest; heart tired, calm. Grow up, mature, this society read. Tired and sad, squat down, to their a hug. Because the world no one can sympathize with you, have mercy on you. You cry, tears is your own; you pain, no one can understand. Then you only tears to smile. 8, each people have youth
36、,Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same; now want anything, for fear that others know, or like to lose the same. 9, the heart move, everything in the world is followed by birth, Rangrang, important thing is often th
37、e most difficult to open ones mouth, because words will reduce its importance; to let strangers people care about your life in the good things, the original is not easy 10, do not blame, do not laugh at who, also dont envy who. Like a person is a kind of feeling, not like a person is true. The truth
38、 is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in, and in the peace of mind; no matter how many grievances, how uncomfortable, and ultimately to heal themselves or their own, others may got
39、 you to comfort, but never know your heart is how wanjianchuanxin. 12, maam, like a movie, learn to appreciate, learn to be grateful, learn tolerance, and goodness, helping others. Instead of accusing the society, as into one; and an exception is better to give than to what 13, dont envy him A sum o
40、f, dont lose your life and the life, respectively is: the former is a we experienced cannot escape in a day finally will last minute, while the latter is our persistent, we want to cherish the memory of those people and things. 14, learn to smile, learn to strong, the world you know so many people,
41、so many people and you are, you cannot change also cant let everyone like you, so also do not want to do. Life is too short to go crazy to love to go to waste, to chase the dream to regret. 15, when temper, a blessing to go. A wounding elegant people, the key is to control their own emotions. With t
42、he mouth is the most stupid behavior. A control negative emotions than a can take a city more powerful water flow slow, language is expensive. People spent two years of time to learn to speak, but to spend a few years time to shut up. That is a kind of ability, that is a kind of wisdom. 16, life is
43、not perfect, sometimes, growth is not a cry, not an eyeful of tears, there is no trace of emotion, there is no gleam of hope, no desire, no action, no static, there is only one kind of downward sinking feeling, sink A murky? 6? 7? 6? 7 sink? 6? 7? 6? 7 toward the bottom of the sink. 17, in some way,
44、 do not go, you will not know the other side scenery is beautiful. To you is not good, you do not mind too much, no one has an obligation to you; you learn knowledge, is you have weapons, you can start from scratch, but not unarmed; how do you treat people, does not represent how others treat you, i
45、f cannot see through this point, only inviting worry. 18, time is like a sponge in the water, as long as you are willing to squeeze, the total water is still there. Every life, after the ups and downs The best test of live, to life, survival and continuation, do not stop the struggle in the joys and
46、 sorrows of life on the road, so that different soul to bear life beat, acceptance of suffering. 19, indifferent to heart, calmly in table, elegant and comfortable life, do not take what is so important. The pursuit will be disappointed; to be alive, you will have trouble. Life is the most afraid of
47、 what all want to care about, but also what all grasp is not firm, without scenery, separated populations, such as not to desire, all docked in the fate of the end. Why is too rigid, the natural, to go stay not to live, let go of obsession, revel is 20, if the fate of the broken Hopes of sailing, ple