上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件上海同济建设管理科技工程公司地址:上海市赤峰路83号2楼邮编:200092目录1.工程概况及施工条件····················································41.1工程概要··························································41.2施工条件··························································52.施工组织机构及总体目标················································62.1施工组织机构·····················································62.2预应力工程总体目标···············································62.3在施工中必须遵守的施工及验收规范·································73.预应力施工工艺流程····················································73.1有粘结预应力梁施工工艺流程·······································73.2施工流程中注意事项···············································83.3土建总包对预应力分项工程工作的协调······························104.预应力施工方法························································104.1有粘结预应力梁····················································104.2预应力钢绞线张拉·················································134.3有粘结预应力钢绞线孔道灌浆·······································164.4预应力钢绞线张拉端封锚···········································185.临时设施······························································185.1施工区部分······················································185.2生活区部分······················································195.3临时设施管理要求················································205.4临时设施示意图··················································206.质量及进度保证措施····················································206.1工程质量保证体系·················································206.2工程质量保证体系·················································21上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件16.3质量监控要点·····················································256.4梁端部楼板抗裂处理···············································256.5施工进度保证措施·················································267.安全生产、文明施工····················································287.1安全生产、文明施工、总目标管理体系及保证措施·····················287.2消防措施·························································298.施工异常情况处理对策及计划···········································298.1浇注混凝土时发现堵管·············································298.2锚垫板端部浇注混凝土产生空洞,导致预应力张拉时锚具内陷的处理:····298.3由于挤压锚失效使张拉预应力钢绞线时固定端失去作用的处理方法:······298.4由于锚垫板保护层厚度较薄使得张拉时梁保护层爆裂的处理方法:········308.5由于局部承压不足引起的端部混凝土张拉时压碎的处理方法:············308.6在预应力没有张拉前总包单位将预应力梁的支撑拆除的处理方法:········309.竣工资料······························································30上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件2本施工组织设计文件编制依据:1、施工设计图纸2、《钢绞线、钢丝束无粘结预应力筋》JG3006-93;3、《混凝土结构工程施工及验收规范》GB50204---2002;4、《预应力筋用锚具、夹具和连接器应用技术规程》GB/T14370---2000;5、《预应力混凝土用钢绞线》GB/T5224---95;6、《预应力用电动油泵》JG/T5029---93;7、《预应力用液压千斤顶》JG/T5028---93;8、《后张预应力施工规程》DGJ08---235---99;9、《预应力混凝土结构设计规程》(上海市标准)DBJ08---69---97;10、《混凝土结构设计规范》GB50010---2002;11、《建筑结构荷载规范》GB50009---2001;12、《建筑工程预应力施工规程》CECS180:200513、同济大学建筑科技工程公司《施工组织设计编写大纲》14、本工程特点、施工现场条件等。编制:欧阳毅新日期:审核:朱竹君日期:批准:吴中权日期:上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件3施工组织设计1、工程概况及施工条件1.1工程概要1.1.1工程名称和地址工程名称:上海中环现代大厦办公楼工程地址:1.1.2工程内容简介本工程为框筒结构,在5~25层楼盖中,各有一根悬挑梁采用了后张法有粘结预应力技术。1.1.3工程特点:一)、本工程在预应力框架梁中配置有粘结预应力钢绞线,有粘结预应力束张拉端采用15--7夹片式群锚体系;二)、该工程预应力工程虽预应力用钢量不大,但对预应力施工质量的要求非常高,作为主要受力钢筋,预应力的施工质量直接关系到主体结构的抗裂及承载力能否达到设计要求。预应力施工期间预应力工程材料的品种较多,但每层用量小,且时间间隔较长,因此施工前必须仔细规划好材料的品种和进场时间。另外,预应力材料订货及检验环节较多,因此必须认真规划好钢绞线、锚具、波纹管、喇叭管等主要材料的订购、进场、检验问题,同时要根据总进度要求,切实安排好技术人员和一般劳动力的配置。三)、预应力筋布置:根据设计图纸要求,预应力梁均采用直径为ΦS15.24有粘结预应力低松弛钢绞线;钢绞线强度等级均为1860MPA。锚具选用STM15系列群锚体系,波纹管,螺旋筋与喇叭管配套选用。锚具张拉端采用Ⅰ类群锚,固定端采用挤压锚。无特殊情况,一般采用单端张拉技术。垫板采用焊接补筋与柱筋焊牢,预应力筋的编束每隔1000MM用铅丝邦牢在定位支架上,预应力筋在截面上应对称布置。约束圈按STM15系列配套选用。固定端的垫板采用Q235钢制作,垫板厚20MM,孔径D=20MM四)、预应力筋的张拉及封锚:预应力梁及框架柱的混凝土强度等级均为C,在混凝土强度达到设计强度的80%以上方能张拉,并超张拉3%。张拉端位于悬挑梁的端部,可做成内凹式,凹进尺寸为150MM。上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件4张拉锚固灌浆完成后才能拆除梁底支撑和模板,并应防止梁底支撑不均匀沉降。灌浆应在张拉锚固后48小时内完成。水泥浆采用525普通硅酸盐水泥拌制,水灰比0.4。五)、本工程预应力梁跨度较大,张拉端锚垫板数量多,柱梁节点非预应力钢筋较密,为避免切割非预应力钢筋,在梁柱绑扎前与总包一起确定非预应力钢筋的排列顺序。六)、预应力的施工需要多专业穿插、配合,在总体施工顺序以及工序间的流水作业方面必须与总承包单位及水电专业做好协调配合工作,以保证总体施工进度和施工安全;七)、本工程中的预应力施工进度直接影响整体土建进度,因此需要制订详细的施工方案,以保证工期的正常进行;八)、为了保证本工程结构在预应力施工阶段的合理受力,必须采取合理的张拉措施,以保证结构在张拉时受力合理;九)、针对结构的复杂程度,必须有充分的思想准备面对施工中会出现的各种难题,以便出现问题时有足够的对策;十)、为了保证结构在张拉阶段的应力损失降到最小,施工阶段结构受力必须经过详细的验算方能确定预应力张拉顺序方案;十一)、为了保证按时、按质完成本工程,必须选派技术及施工力量雄厚的项目部来完成本预应力工程的施工任务。1.1.3有关单位建设单位:设计单位:上海浚源建筑设计事务所监理单位:总包单位:1.2施工条件根据现场实际情况,预应力施工要求有如下的施工条件:电源:380V电源,总功率约30KW。临时设施:A.现场管理人员及技术工人临时办公室及宿舍2间;B.张拉设备及工具仓库1间;材料堆放及断料场地:约80M2,长*宽约为20M*4M。用于堆放钢绞线及波纹管场地要求:通风干燥,如露天堆放应放置垫木,有防雨覆盖措施。垂直运输:张拉设备及钢绞线等预应力材料垂直吊运。道路进出:钢绞线按进度分批进场,汽车运输。上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件52、施工组织机构及总体目标2.1施工组织机构为确保预应力工程质量,我公司组织中国银联项目(二期工程)预应力工程项目部,协调处理施工现场材料、技术、安全、质量、后勤。预应力工程项目部组成人员:公司项目部经理高级工程师负责协调材料、技术、安全、质量项目部经理负责现场技术、安全、质量、进度项目工程师工程师负责安全、技术、质量施工现场组织预应力专项工程项目部,由项目部经理常住施工现场项目部管理组织机构如下:公司项目部经理侯宝福项目部经理汤良耀项目工程师欧阳毅新施工陈负琛责啸人现场陆材汉料洲员现场翁安振全武员张拉李负云责康人设备郭负责勋人质量刘负责博人资张料捷员2.2预应力工程总体目标1、工程质量目标:确保优良工程;2、工程进度目标:按总承包单位总体工程进度计划控制,决不耽误总体工期;3、安全生产:防止重伤,杜绝死亡,努力达到无重大伤亡事故、无重大机械事故、无火灾事故、上海中环现代大厦办公楼预应力工程施工组织设计----------------施工技术文件6无事物中毒事故等“四无”要求;4、文明施工:努力做好规范管理,维护场容、场貌,努力达到安全文明工地的标准;5、按项目管理的要求组织各个工种的平衡和流水作业,通过有效的协调指挥,使整体工地保持最优化的组合和功效。2.3在施工中必