客运铁路段特大桥墩身桥台钢管脚手架施工技术交底 7页

交底记录工程名称新建铁路北京至沈阳客运专线分部（分项）工程脚手架施工交底项目墩身、桥台脚手架技术交底图纸名称、图号京沈施桥-202交底记录：一、交底范围高林台特大桥墩身、桥台脚手架施工。二、脚手架形式1.脚手架选择本工程考虑到施工工期、质量、安全和合同要求，故在选择时，应充分考虑以下几点：（1）架体的结构设计，力求做到结构要安全可靠，造价经济合理。（2）在规定的条件下和规定的使用期限内，能够充分满足预期的安全性和耐久性。（3）选用材料时，力求做到常见通用、可周转利用，便于保养维修。（4）结构选型时，力求做到受力明确，构造措施到位，升降搭拆方便，便于检查验收；（5）综合以上几点，脚手架的搭设，还必须符合JCJ59-99检查标准要求，要符合相关文明标化工地的有关标准。2.脚手架材料选择（1）钢管落地脚手架，选用外径48mm，壁厚3mm，钢材强度等级Q235，钢管表面应平直光滑，不应有裂纹、分层、压痕、划道和硬弯，新用的钢管要有出厂合格证。（2）本工程钢管脚手架的搭设使用可锻铸造扣件，应符合建设部《钢管脚手扣件标准》JGJ22-85的要求，由有扣件生产许可证的生产厂家提供，不得有裂纹、气孔、缩松、砂眼等锻造缺陷，扣件的规格应与钢管相匹配，贴和面应平整，活动部位灵活，夹紧钢管时开口处最小距离不小于5mm。钢管螺栓拧紧力矩达65N.m时不得破坏。如使用旧扣件时，扣件必须取样送有相关国家资质的试验单位，进行扣件WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol\n抗滑力等试验，试验结果满足设计要求后方可在施工中使用。（3）脚手板、脚手片采用符合有关要求。（4）安全网采用密目式安全网，网目应满足2000目／100cm2，做耐贯穿试验不穿透，1.6×1.8m的单张网重量在3kg以上，颜色应满足环境效果要求，选用绿色。要求阻燃，使用的安全网必须有产品生产许可证和质量合格证，以及建筑安全监督管理部门发放的准用证。三、脚手架搭设流程1.操作流程1.1落地脚手架搭设的工艺流程为：场地平整、夯实→基础承载力实验、材料配备→定位设置通长脚手板、底座→纵向扫地杆→立杆→横向扫地杆→小横杆→大横杆（搁栅）→剪刀撑→铺脚手板→扎防护栏杆→扎安全网。1.2定距定位：根据模板构造要求在桥墩四角用尺量出内、外立杆离墙距离，并做好标记；用钢卷尺拉直，分出立杆位置，并用小竹片点出立杆标记；垫板、底座应准确地放在定位线上，垫板必须铺放平整，不得悬空。1.3在搭设首层脚手架过程中，沿四周每框架格内设一道斜支撑，拐角处双向增设。当脚手架操作层高出斜撑顶两步时，宜先立外排，后立内排，其余按下构造要求搭设。2.施工步骤2.1地基处理参照京沈施桥—202、203图纸发现，桥墩边缘距承台边缘较远，脚手架立杆可直接立在承台上，只需设钢垫板，不需要进行地基处理.路线左右侧圆端顶帽已超出承台范围，需对土地基进行处理，从承台边缘向外围按照3－5‰找坡。回填土夯实后，上面铺设5cm厚、20cm宽以上的脚手板沿桥墩周围通长布置，之后在脚手板上放置钢底座，钢底座上放置立杆，之后按设计的立杆间距进行放线定位，铺设木脚手板要平稳，不得悬空。下雨过后要对脚手架架体基础进行全面检查，严禁脚手架基底积水下沉。2.2排水措施在距脚手架外排立杆外0.5米处，设置一排水沟，排水沟坡度为3－5‰。在核WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol\n实位置设出口，引排到指定地点，或者在最低点，设置积水坑，水流入坑内，用潜水泵将水排出场外。2.3立杆设置(1)脚手架采用双排双立杆，立杆顶端高出结构1.5米，立杆接头采用对接扣件连接，立杆与横杆采用直角扣件连接。(2)脚手架立杆纵距1.5m，横距1m，步距1.5m；内侧立杆距模板边缘不超过20cm。图1立杆及排水示意图(3)脚手架的底部立杆采用不同长度的钢管参差布置，使钢管立杆的对接接头交错布置，高度方向相互错开50cm以上，且要求相邻接头不应在同步同跨内，以保证脚手架的整体性。(4)立杆应设置垫木和钢底座，并设置纵横方向扫地杆，采用直角扣件固定在距底座下皮20㎝处的立杆上。(5)立杆的垂直偏差应控制在不大于架高的1／400。(6)同排内外侧两根立杆连线与墩身表面垂直。2.4大横杆、小横杆设置(1)大横杆在脚手架高度方向的间距1.5m，以便立网挂设，大横杆置于立杆里面，每侧外伸长度为15cm。(2)用直角扣件与立柱扣紧；其长度大于3跨、不小于6米，同一步大横杆四周要交圈。大横杆采用对接扣件连接，其接头交错布置，不在同步、同跨内。相邻接头水平距离不小于50㎝，各接头距立杆的距离不大于50㎝。WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol\n(3)按立杆与大横杆交点（主节点）及大横杆跨中设置小横杆，小横杆与墩台身表面垂直，主节点处两端采用直角扣件扣紧在立柱上，跨中大横杆处扣紧在大横杆上，以形成空间结构整体受力。(4)根据作业层脚手板搭设的需要，可在两立柱之间在等间距设置增设1～2根小横杆，保证脚手板端头距离小横杆不超过15cm。图2立杆及纵横水平杆布置图2.5剪刀撑(1)本脚手架剪刀撑随立柱、纵横向水平杆同步搭设，用通长剪刀撑沿架高连续布置。(2)脚手架外侧立面必须设剪刀撑，剪刀撑一般每5步5跨设置一道，斜杆与地面的夹角为50.2度。斜杆相交点处于同一条直线上，并沿架高连续布置。(3)剪刀撑的一根斜杆扣在立柱上，另一根斜杆扣在小横杆伸出的端头上，两端分别用旋转扣件固定，在其中间每个主节点处均设固定点。所有固定点距主节点距离不大于15㎝。(4)最下部的斜杆与立杆的连接点距地面的高度控制在30㎝内。(5)施工中应根据结构物的高度及脚手架的长度和宽度，结合现场实际情况合理设置剪刀撑和斜撑。(6)剪刀撑的杆件连接采用搭接，其搭接长度≥100㎝，并用不少于2个旋转扣件固定，端部扣件盖板的边缘至杆端的距离≥10㎝。2.6脚手板铺设(1)脚手板首选采用松木，厚5㎝、宽20－30㎝、长度不少于3.5米的硬木板；也可以采用竹串片脚手板。WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol\n(2)脚手板设置在3根横向水平杆上，并在两端8㎝处用直径1.2㎜的镀锌铁丝箍绕2～3圈固定。当脚手板长度小于2米时，可采用两根小横杆，各杆距接缝的距离均不大于15㎝。(3)里外立杆间应满铺脚手板。拐角交接处平整，避免出现探头及空档现象，铺设时要选用完好无损的脚手板，发现有破损的要及时更换。2.7斜道(1)墩台高度不大于6m的脚手架，采用一字型斜道；(2)墩台高度大于6m的脚手架，采用之字型斜道；(3)斜道宜附着外脚手架或建筑物设置；斜道宽度不小于0.6m，坡度采用1∶1；拐弯处应设置平台，其宽度不应小于斜道宽度；(4)斜道两侧及平台外围均应设置栏杆及挡脚板。栏杆高度应为1.2m，挡脚板高度不应小于20cm；(5)斜道脚手板横铺时，应在横向水平杆下增设纵向支托杆，纵向支托杆间距不应大于50cm；脚手板顺铺时，接头宜采用搭接；下面的板头应压住上面的板头，板头的凸棱外宜采用三角木填顺；斜道脚手板上应设置防滑木条，木条厚度宜为2～3cm。2.8防护设施(1)在作业层下部架设一道水平兜网，随作业层上升，同时作业不超过两层，设置安全网防护。(2)脚手架外侧使用建设主管部门认证的合格绿色密目式安全网封闭，且将安全网固定在脚手架外立杆里侧。(2)选用18铅丝张挂安全网，要求严密、平整。(3)脚手架外侧必须设1.2m高的防护栏杆和30cm高踢脚杆，顶排防护栏杆不少于2道，高度分别为0.6m和1.2m。WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol\n图3防护栏杆示意图四、施工质量要求1.脚手架搭设完毕或分段搭设完毕，应按规定对脚手架工程的质量进行检查，经检查合格后方可交付使用。2.本工程的脚手架高度均小于20m，由单位工程负责人组织技术安全人员进行检查验收。3.验收时应具备下列文件：(1)脚手架构配件的出厂合格证或质量分类合格标志；(2)脚手架工程的施工记录及质量检查记录；(3)脚手架搭设过程中出现的重要问题及处理记录，(4)脚手架工程的施工验收报告。4.脚手架工程的验收，除查验有关文件外，还应进行现场检查，检查应着重以下各项，并记入施工验收报告。(1)构配件和加固件是否齐全，质量是否合格，连接和挂扣是否紧固可靠；(2)安全网的张挂及扶手的设置是否齐全；(3)基础是否平整坚实、支垫是否符合规定；(4)垂直度及水平度是否合格。WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol\n5.现场记录施工日志。五、安全注意事项及文明施工1.脚手架搭设安全技术措施1.1操作人员必须持有登高作业操作证，方可上岗。1.2架子在搭设(拆卸)过程要做到文明作业，不得从架子上掉落工具、物品；同时必须保证自身安全，高空作业需穿防滑鞋，佩戴安全帽、安全带，未佩戴安全防护用品不得上架子。1.3在架子上施工的各工种作业人员，应注意自身安全；不得随意向下、向外抛、掉物品，不得随意拆除安全防护装置。1.4雨、雪、雾及六级以上大风等天气，严禁进行脚手架搭设、拆除工作。1.5应设安全员负责对脚手架进行经常检查和保修。2.脚手架拆除安全技术措施2.1拆架前，全面检查拟拆脚手架，根据检查结果，拟订出作业计划，有计划的进行拆除。2.2拆架时应划分作业区，周围设绳绑围栏或竖立警戒标志，地面应设专人指挥，禁止非作业人员进入。2.3拆架的高处作业人员应戴安全帽、系安全带、扎裹腿、穿软底防滑鞋。2.4拆架程序应遵守“由上而下，先搭后拆”的原则，即先拆脚手板、剪刀撑，而后拆小横杆、大横杆、立杆等，并按“一步一清”原则依次进行。严禁上下同时进行拆架作业。2.5拆立杆时，要先抱住立杆再拆开最后两个扣，拆除大横杆、剪刀撑时，应先拆除中间扣件，然后托住中间，再解端头扣。2.6拆架时严禁碰撞脚手架附近电源线，以防触电事故。2.7在拆架时，不得中途换人，如必须换人时，应将拆除情况交代清楚后方可离开。2.8如遇强风、大雨、雪等特殊气候，不应进行脚手架的拆除，严禁夜间拆除。WithanexternalintelligentvideoanalysisequipmentsuchasSAVIA,canreachtheborderdetection,intrusion,retrograde,count,spraying,intelligentvideoanalysisfunctionssuchasocclusionalarmwiththevideocamera.NetworkvideocodectechnologyofthesysteminaccordancewiththenationalstandardofSVACtechnologyrequiredtoimplementdatacollectionandExchange.Videobitratecanbeadjustedaccordingtotheimagequalitybetween2Mbps-16Mbps,tomeettheapplicationrequirementsmonitoringprocesstotransferimages.Thisreservationandmunicipalpublicsecuritysystem,CityEmergencyOfficeofnetworkinterfaces.Rehabilitationcentresformonitoringsystemmonitoredbythefollowingareas:keymanagementareasofoperatingroomnursingunitarea;Healthcarecorridorareas;crowdedpublicplaces,toll,pharmacyWindows,medicalequipment,warehouseandimportantprotectedareas;buildingaccessentrancekeyareas;Officearea,importantseparation;room,equipmentroomandotherimportantmachines,instruments/canteen,restaurantmanagementsites;carparkmanagementareassupervisoryareas.Systemequipmentarenetworkcameras,powermodules,switches,controlcenterequipmentmainlytomonitordigitalworkstation,storagedevices,alarm,alarmunits,UPS,LCDmonitorsandsoon.Injuryrecovery,1,2ndflooroftheusednetworktransmissionofvideosignaltransmissionmodetouploadtothemedicalfloorofthesecuritymonitoringroom.Transmissionfiberontherehabilitationfloor...Control.Localmonitoringcentercanview/controlcamerasaswellasdistributionofanyremote-controlcenterofthecamera.Localcontrol