山西框架桥接长混凝土分项工程技术交底

'技术交底施工单位：中铁十局山西中南部铁路通道ZNTJ-15标项目部三分部编号：工程名称新建山西中南部铁路通道京九线K484+521框架桥接长交底类别K484+521框架桥接长混凝土施工技术交底技术交底内容：1、K484+521框架桥接长混凝土施工技术交底2、严格按交底施工（内容附后）交底单位中铁十局山西中南部铁路通道ZNTJ-15标项目部三分部接收单位交底人复核人批准人现场负责人接收人签名接收时间massestour;Increasetheintensityoftheinvestigationandmediationofdisputes,fullimplementationofthebacklogforprocessingoflettersandcallssystemofleadingcadres;Keepagainstallformsofillegalandcriminalactivitiesofhighhanded,ensureagoodsocialorder;Strengthenthecollectionofintelligenceanalysis,closelyguardedactivitiesofevilcults;Fullimplementationofthesocialsecuritypreventionandcontrolinkeyareasandthetreatmentofseriouspublicsecurityissuestotroubleshoot,ensuringharmonyandstability.Fourfurtherstrengthenpublicityandideologicalwork.Typicalhighlightsofselectedtreecultivation,andmoralexemplarsintheprovincedonothaveemerged,respectingthemoralmodelHangLiPoh,theprovincialworkerYuYoubo,State-levelmodelworkerFanYouzhi,HuJingqiu,includingYunnan,nujiang"sfinest,promotedthetheme,thecombinationofapositiveenergy.HunansatelliteTVinwangjiduVillagecompletedthemetamorphosisoftheshow"sfilming,silentnunutelevisionprogramairedthe"busybody"LaoLi,ancientvillage,woodandJiacunandXXmvillageswereratedasprovincialandStatelevelcivilizedvillage.XXinternationalvisibilityandreputationfurtherenhanced.Inaddition,wecontinuetopromotedemocracy,people"scongresses,politicalconsultativeconferenceroleplay,gongqingfu,amassorganizationtobetterservethescientificdevelopment.Further K484+521框架桥接长混凝土施工技术交底一、工程概况山西中南部铁路通道引入京九线，引起既有涵洞进行接长施工。框架桥结构尺寸如下：顶板0.8m，底板0.9m，边墙0.8m。设计净空5.3m，桥下机动车车最小使用净高为4.5m总高为7m，京九线东侧接长7m，西侧接长8m。沿铁路方向总宽为17.6m.由于本次涵洞接长施工为既有线改造作业,影响该处既有线的路基和线路稳定,K484+521接长框架桥影响台前站北咽喉区的路基稳定。为保证该工程的顺利实施，确保既有线路基、线路设备稳定，缩短施工周期，最大限度减少对既有线运输安全及运能的干扰，施工期间上行线列车运行条件计划45km/h限速运行。二、浇筑作业前准备混凝土浇筑前，必须对所有机械设备、工具、材料进行认真检查，保证机械设备正常高效运行，尤其要对模板、钢筋间距、钢筋保护层、预埋件、构件轮廓几何尺寸等作认真检查，报监理批准后方可浇筑。浇筑前，必须对材料（水泥、石子、砂）及各岗位的人员、机械的备用一一落实。浇筑时应控制混凝土的入模温度，必要时，通过热工计算，采取相应的措施。混凝土在拌和过程中，必须严格控制混凝土的配合比和坍落度。所用水泥、细骨料、粗骨料必须先进行取样试验，试验合格后方可使用。根据现场砂、石含水量，由理论配合比换算为施工配合比，施工中严格控制水灰比。混凝土每次拌制砼前必须按施工配合比，调试电子计量器，项目部派人到混凝土搅拌站盯岗值班，严格监督检查混凝土的搅拌质量。三、混凝土浇筑作业massestour;Increasetheintensityoftheinvestigationandmediationofdisputes,fullimplementationofthebacklogforprocessingoflettersandcallssystemofleadingcadres;Keepagainstallformsofillegalandcriminalactivitiesofhighhanded,ensureagoodsocialorder;Strengthenthecollectionofintelligenceanalysis,closelyguardedactivitiesofevilcults;Fullimplementationofthesocialsecuritypreventionandcontrolinkeyareasandthetreatmentofseriouspublicsecurityissuestotroubleshoot,ensuringharmonyandstability.Fourfurtherstrengthenpublicityandideologicalwork.Typicalhighlightsofselectedtreecultivation,andmoralexemplarsintheprovincedonothaveemerged,respectingthemoralmodelHangLiPoh,theprovincialworkerYuYoubo,State-levelmodelworkerFanYouzhi,HuJingqiu,includingYunnan,nujiang"sfinest,promotedthetheme,thecombinationofapositiveenergy.HunansatelliteTVinwangjiduVillagecompletedthemetamorphosisoftheshow"sfilming,silentnunutelevisionprogramairedthe"busybody"LaoLi,ancientvillage,woodandJiacunandXXmvillageswereratedasprovincialandStatelevelcivilizedvillage.XXinternationalvisibilityandreputationfurtherenhanced.Inaddition,wecontinuetopromotedemocracy,people"scongresses,politicalconsultativeconferenceroleplay,gongqingfu,amassorganizationtobetterservethescientificdevelopment.Further 混凝土使用的部位分为地板、框架身、八字墙等，框架身砼灌注分底板、边墙和顶板两次进行施工，框架底板砼强度达到设计强度的25%后，再绑扎墙身钢筋，边墙施工缝留于剪力最小处。边墙每次灌注砼时，水平分层，纵向分段，由一端向另一端推进，避免纵向施工缝。底板必须一次连续不间断灌注完毕，不准留施工缝。砼浇筑时自由倾落度超过2m时采用串筒。砼每次浇筑前洒水湿润，但不得存有积水。施工缝处的水泥砂浆薄膜，松动石子或松散混凝土层要凿除彻底，用水冲净，并经现场主管技术人员和质检工程师共同确认。新砼浇筑前，在横向施工缝处先铺一层厚约15mm，并与砼灰砂比相同而水灰比略小的水泥砂浆。砼振捣采用插入式振捣器，移动间距30cm，且插入下层砼深度5～10cm，每一振点的延续时间宜为20～30S，以砼不再沉落，不出现气泡，表面呈现浮浆为度。不准漏振，不准过振。振捣时选派有经验的混凝土工负责捣固，砼浇注全过程技术人员、质检工程师、试验工程师、项目副经理必须在现场指导监督，并严格执行交接班制度。浇筑过程中注意加强倒角、交界面以及钢筋密集部位的振捣，为防止钢筋过密出现漏振，除采用50mm插入式振捣棒，还要采用30mm插入式振捣棒进行辅助振捣，保证混凝土振捣密实。massestour;Increasetheintensityoftheinvestigationandmediationofdisputes,fullimplementationofthebacklogforprocessingoflettersandcallssystemofleadingcadres;Keepagainstallformsofillegalandcriminalactivitiesofhighhanded,ensureagoodsocialorder;Strengthenthecollectionofintelligenceanalysis,closelyguardedactivitiesofevilcults;Fullimplementationofthesocialsecuritypreventionandcontrolinkeyareasandthetreatmentofseriouspublicsecurityissuestotroubleshoot,ensuringharmonyandstability.Fourfurtherstrengthenpublicityandideologicalwork.Typicalhighlightsofselectedtreecultivation,andmoralexemplarsintheprovincedonothaveemerged,respectingthemoralmodelHangLiPoh,theprovincialworkerYuYoubo,State-levelmodelworkerFanYouzhi,HuJingqiu,includingYunnan,nujiang"sfinest,promotedthetheme,thecombinationofapositiveenergy.HunansatelliteTVinwangjiduVillagecompletedthemetamorphosisoftheshow"sfilming,silentnunutelevisionprogramairedthe"busybody"LaoLi,ancientvillage,woodandJiacunandXXmvillageswereratedasprovincialandStatelevelcivilizedvillage.XXinternationalvisibilityandreputationfurtherenhanced.Inaddition,wecontinuetopromotedemocracy,people"scongresses,politicalconsultativeconferenceroleplay,gongqingfu,amassorganizationtobetterservethescientificdevelopment.Further 砼表面析水时，要采用措施予以消除，但不得扰动已浇注的砼。砼浇筑由试验工程师做坍落度试验，做砼抗压、抗渗试件，作好砼灌注记录。试验工程师按规定取送砼试件，试件按规定日期必须进行试压和抗渗试验，不准延期。在每次浇筑过程中必须控制好标高，控制好基础的顶面平整度及高程以保证后续底板与边墙、顶板的浇筑工作。该框架小桥混凝土施工中注意水沟边墙与框架身边墙同时浇筑过程中一定要振捣密室，保证边墙外侧、内部无空洞及蜂窝麻面的现象。四、混凝土养护作业混凝土浇筑完毕后，不迟于12h即草袋覆盖和养护，直至达到砼设计强度，根据养护期间大气温度及湿度按照规范要求确定养护天数，采用喷淋养护，保证混凝土面湿润，保证模板接缝处不至失水干燥，养护至拆模后。框架桥混凝土模板拆模应符合下列规定：要混凝土的拆模严格按规范要求施工，不承重的侧模要在砼强度必须达到2.5Mpa，顶板砼必须达到设计强度的100%后才能拆除。拆摸宜按立模顺序逆向进行，不得伤损混凝土，并减少模板损伤。具体步骤为，拆模宜按立模顺序逆向拆模，不得损伤混凝土，并减少模板破坏。当模板与混凝土脱离后，方可拆卸、吊运模板。拆除临时埋设于混凝土中的预埋部件时，不得损伤混凝土，且不得影响或中断混凝土的养护工作。massestour;Increasetheintensityoftheinvestigationandmediationofdisputes,fullimplementationofthebacklogforprocessingoflettersandcallssystemofleadingcadres;Keepagainstallformsofillegalandcriminalactivitiesofhighhanded,ensureagoodsocialorder;Strengthenthecollectionofintelligenceanalysis,closelyguardedactivitiesofevilcults;Fullimplementationofthesocialsecuritypreventionandcontrolinkeyareasandthetreatmentofseriouspublicsecurityissuestotroubleshoot,ensuringharmonyandstability.Fourfurtherstrengthenpublicityandideologicalwork.Typicalhighlightsofselectedtreecultivation,andmoralexemplarsintheprovincedonothaveemerged,respectingthemoralmodelHangLiPoh,theprovincialworkerYuYoubo,State-levelmodelworkerFanYouzhi,HuJingqiu,includingYunnan,nujiang"sfinest,promotedthetheme,thecombinationofapositiveenergy.HunansatelliteTVinwangjiduVillagecompletedthemetamorphosisoftheshow"sfilming,silentnunutelevisionprogramairedthe"busybody"LaoLi,ancientvillage,woodandJiacunandXXmvillageswereratedasprovincialandStatelevelcivilizedvillage.XXinternationalvisibilityandreputationfurtherenhanced.Inaddition,wecontinuetopromotedemocracy,people"scongresses,politicalconsultativeconferenceroleplay,gongqingfu,amassorganizationtobetterservethescientificdevelopment.Further 混凝土拆模后，对混凝土采用蓄水、浇水、覆盖洒水措施进行潮湿养护，在砼表面处于潮湿状态时，迅速采用无纺布将暴露面砼覆盖、包裹，再用塑料布将无纺布保湿材料包裹。包裹、覆盖期间，内表面应具有凝结水珠。养护用水温度低于砼表面温度时，二者温差不得大于15℃。砼在炎热季节拆模后，若天气产生骤然变化，应采取适当的隔热措施，防止砼产生过大的温差应力。砼养护期间，要定时测定砼芯部温度、表面温度以及环境气温，并作好养护期间的测温记录。五、混凝土施工作业安全事项1.施工现场做到布局合理，场地平整，道路畅通，机械设备安置稳固、材料堆放整齐，用电设施安装触电保护器，为安全生产创造良好的环境。施工现场设置醒目的安全标语和安全警示标志，提示工人注意安全。施工便道边坡稳定，并做好必要防护。2.工人进入施工现场必须配戴安全帽，双层及高空作业施工必须栓系安全带、挂安全网，脚手架搭设牢固稳定，上层作业施工机具设备安设稳固，提升设备不乘人。3.各种排架、临时支撑必须连接牢固、稳定。4.加强对全体员工的人身安全自我保护意识进行教育，制定完整的管理措施，防止人身伤亡事故的发生。5.临时用电、各种设备机械操作人员必须持证上岗，严禁无证操作。6.所有施工人员必须佩带相应的劳保用品，如：安全帽、安全带、绝缘鞋、绝缘手套、防护眼镜等。7.配置安全防火器材，遵守安全防火法规，提高全员防火意识，防止火灾事故发生。8.所有作业人员做到岗前不饮酒，酒后不上岗。massestour;Increasetheintensityoftheinvestigationandmediationofdisputes,fullimplementationofthebacklogforprocessingoflettersandcallssystemofleadingcadres;Keepagainstallformsofillegalandcriminalactivitiesofhighhanded,ensureagoodsocialorder;Strengthenthecollectionofintelligenceanalysis,closelyguardedactivitiesofevilcults;Fullimplementationofthesocialsecuritypreventionandcontrolinkeyareasandthetreatmentofseriouspublicsecurityissuestotroubleshoot,ensuringharmonyandstability.Fourfurtherstrengthenpublicityandideologicalwork.Typicalhighlightsofselectedtreecultivation,andmoralexemplarsintheprovincedonothaveemerged,respectingthemoralmodelHangLiPoh,theprovincialworkerYuYoubo,State-levelmodelworkerFanYouzhi,HuJingqiu,includingYunnan,nujiang"sfinest,promotedthetheme,thecombinationofapositiveenergy.HunansatelliteTVinwangjiduVillagecompletedthemetamorphosisoftheshow"sfilming,silentnunutelevisionprogramairedthe"busybody"LaoLi,ancientvillage,woodandJiacunandXXmvillageswereratedasprovincialandStatelevelcivilizedvillage.XXinternationalvisibilityandreputationfurtherenhanced.Inaddition,wecontinuetopromotedemocracy,people"scongresses,politicalconsultativeconferenceroleplay,gongqingfu,amassorganizationtobetterservethescientificdevelopment.Further 9.全面规划，协调好与当地政府、群众的关系，做到严以律已，礼貌待人，团结同志，文明施工，不扰民，不污染环境，树立“安全第一、预防为主”的指导思想，定期对职工进行文明、安全施工教育。massestour;Increasetheintensityoftheinvestigationandmediationofdisputes,fullimplementationofthebacklogforprocessingoflettersandcallssystemofleadingcadres;Keepagainstallformsofillegalandcriminalactivitiesofhighhanded,ensureagoodsocialorder;Strengthenthecollectionofintelligenceanalysis,closelyguardedactivitiesofevilcults;Fullimplementationofthesocialsecuritypreventionandcontrolinkeyareasandthetreatmentofseriouspublicsecurityissuestotroubleshoot,ensuringharmonyandstability.Fourfurtherstrengthenpublicityandideologicalwork.Typicalhighlightsofselectedtreecultivation,andmoralexemplarsintheprovincedonothaveemerged,respectingthemoralmodelHangLiPoh,theprovincialworkerYuYoubo,State-levelmodelworkerFanYouzhi,HuJingqiu,includingYunnan,nujiang"sfinest,promotedthetheme,thecombinationofapositiveenergy.HunansatelliteTVinwangjiduVillagecompletedthemetamorphosisoftheshow"sfilming,silentnunutelevisionprogramairedthe"busybody"LaoLi,ancientvillage,woodandJiacunandXXmvillageswereratedasprovincialandStatelevelcivilizedvillage.XXinternationalvisibilityandreputationfurtherenhanced.Inaddition,wecontinuetopromotedemocracy,people"scongresses,politicalconsultativeconferenceroleplay,gongqingfu,amassorganizationtobetterservethescientificdevelopment.Further'