一次,他在核实数据时,认为部分数据需要重新测量,但项目部的车都被派出去了。belimitedtonomorethan2daysofwork,materialdepositedinspecialinsulatedcontainers,materialhandlingtogentlyandmakeuseofthermalinsulationmaterialinwindproof,waterproof,moisture-proofmeasure.6.2thermaldesignoptimizationforhigh-temperaturespecialthermalinsulationforpipingsupportandhangerdesign,reducedheatdissipationofthehangers,ensurethatthewalldoesnotoverheat.Small-diameterpiping,thermalinstrumentlayoutandpositioningofsupportandhangerdesigntakefullyintoaccounttheexpansionspaceandinsulationthickness.Large-diameterpipesafterheatpreservationplasteringconstructionofvalves,turbine,checkingsmoothsurface,hightemperaturepowderpaintfullydryafter.Protectivecoveringsforelectricequipmentinsulationboardsdesignedwithpressureplate,whenorderingaccordingtotheinstallationdiagram,modelspecificationspublishingorder,ensurewheninstallingcornersneat,uniformappearance,reducetheamountofon-sitemachining.Beforevalves,flangeinsulationshellconstruction,besuretomakeaunifiedmodel,allvalves,flanges,insulationcoverunified,tidyandbeautiful.Whenfourpartssuchaspipes,boilerinsulation,mustdofirstarticleinspection,proofofdesignandconstructionmethods,technologycanmeetthetechnologicalrequirements,beforeextensiveconstruction.Boilersteelbeams,dooropeningboxesdesignedwithinsulationgaskets,flangecannotbeoblique,evenfastened.Backintotheslopeofthetubingduringinstallationpayattentiontothepiping,oilstationisalowpoint.Refuelingmustbecontrolledwhencastingmaterialparts,selectlowthermalconductivitymaterialsasfaraspossible,ensurethatthesepartsdonotoverheat.6.3qualitydefectsofinsulationtechnologymanagementoptimizationofconstructionprocessanddevelopareasonableduration,regionaltransferofstrictly六种脚手架施工方案(扣件式钢管落地脚手架)2010-09-03一扣件式钢管落地脚手架扣件式钢管落地脚手架是当前采用比较普遍的一种脚手架,这种脚手架是由钢管和专用扣件组成,具有承载力大,装拆方便,搭设灵活,也比较经济适用,这种脚手架不受施工结构形体的限制,所以适用范围比较广。(一)施工方案1.为了保证脚手架搭设符合标准、安全可靠,同时也要满足施工的需要,在脚手架搭设前,应根据工程的特点和施工工艺,确定脚手架搭设形式,制定搭设方案,在方案中应考虑基础的处理,搭设的要求、杆件的间距、步距、拉结点(连墙件)的设置位置、连接方法,还应绘制施工详图及大样图。2.脚手架的搭设高度超过规范规定的,要求进行计算。脚手架搭设高度不宜过高一般不超过50米,脚手架搭设过高即不安全也不经济。搭设高度超过24米时,应对脚手架的整体刚度和稳定性从构造上进行加强,如纵向剪刀撑连续设置,增加横向剪刀撑(斜撑),连墙件(拉结点)的强度相应提高,间距缩小。当搭设高度超过50米时,可采用双立杆或加密立杆间距,也可采用分段卸荷或分段搭设的方法,将各段脚手架荷载传给建筑结构承担,但要进行设计计算。3.脚手架的设计计算必须符合《建筑施工扣件式钢管脚手架安全技术规范》JGJ130的规定,并经企业技术部门的专业技术人员审核,企业技术负责人签字批准。高度超过24米的落地式钢管脚手架,必须单独编制专项施工方案,并由施工企业技术部门的专业技术人员及监理单位专业监理工程师进行审核,审核合格由施工企业技术负责人和监理单位总监理工程师签字。4.脚手架的施工方案应与施工现场搭设的脚手架相符,当现场因故改变脚手架类型时,必须重新修改脚手架方案并经重新审批后,方可施工。(二)立杆基础1.根据脚手架的搭设高度、使用的荷载情况、搭设场地的大致情况,对脚手架立杆基础进行处理,基础处理的好与坏直接影响架体稳定。由于施工进度的不合理要求和施工工艺等多种原因,建筑物基础或地下工程结束后还槽土不能按规范要求进行逐步回填夯实,达不到脚手架基础所需要的承载力,如不采取措施,在脚手架长期荷载作用下特别是雨后,地基会出现不均匀的下沉,轻者造成脚手架严重变形和倾斜,重者造成脚手架坍塌导致恶性事故的发生。所以必须要保证立杆基础的处理质量,满足脚手架基础承载力的要求,必要时要采取措施增强脚手架基础的整体刚度。一次,他在核实数据时,认为部分数据需要重新测量,但项目部的车都被派出去了。belimitedtonomorethan2daysofwork,materialdepositedinspecialinsulatedcontainers,materialhandlingtogentlyandmakeuseofthermalinsulationmaterialinwindproof,waterproof,moisture-proofmeasure.6.2thermaldesignoptimizationforhigh-temperaturespecialthermalinsulationforpipingsupportandhangerdesign,reducedheatdissipationofthehangers,ensurethatthewalldoesnotoverheat.Small-diameterpiping,thermalinstrumentlayoutandpositioningofsupportandhangerdesigntakefullyintoaccounttheexpansionspaceandinsulationthickness.Large-diameterpipesafterheatpreservationplasteringconstructionofvalves,turbine,checkingsmoothsurface,hightemperaturepowderpaintfullydryafter.Protectivecoveringsforelectricequipmentinsulationboardsdesignedwithpressureplate,whenorderingaccordingtotheinstallationdiagram,modelspecificationspublishingorder,ensurewheninstallingcornersneat,uniformappearance,reducetheamountofon-sitemachining.Beforevalves,flangeinsulationshellconstruction,besuretomakeaunifiedmodel,allvalves,flanges,insulationcoverunified,tidyandbeautiful.Whenfourpartssuchaspipes,boilerinsulation,mustdofirstarticleinspection,proofofdesignandconstructionmethods,technologycanmeetthetechnologicalrequirements,beforeextensiveconstruction.Boilersteelbeams,dooropeningboxesdesignedwithinsulationgaskets,flangecannotbeoblique,evenfastened.Backintotheslopeofthetubingduringinstallationpayattentiontothepiping,oilstationisalowpoint.Refuelingmustbecontrolledwhencastingmaterialparts,selectlowthermalconductivitymaterialsasfaraspossible,ensurethatthesepartsdonotoverheat.6.3qualitydefectsofinsulationtechnologymanagementoptimizationofconstructionprocessanddevelopareasonableduration,regionaltransferofstrictly2.沿脚手架四周应设置排水沟或在周边浇筑砼散水坡。如果不设置排水设施,当湿作业或多雨天气时,大量水淤在脚手架基础内,在荷载的作用下,土质逐渐变实、沉降。脚手架将会发生不均匀的下沉,导致架体的严重变形、倾斜。3.目前使用脚手管是Φ48×3.5㎜的普通低碳高频焊缝钢管,其截面很小,立杆是脚手架的主要受力杆件,它的作用就是将脚手架上所承受的荷载通过大、小横杆传递到立杆的基础,通过底座、垫板传到地基上。为防止发生钢管不均匀陷入地面,引起架体的倾斜、倒塌的严重后果,就应根据脚手架搭设的高度来确定立杆底座的处理方式。首先地基处理应牢固可靠,垫板厚度不小于50㎜,长度不小于2m通长铺设,每块板上不少于2根立杆,铺设平稳,不得有悬空,脚手板底座应用钉子钉牢在垫木上,如采用配筋砼地梁可不垫板只垫底座。4.脚手架必须设置纵向和横向扫地杆。纵向扫地杆应采用直角扣件固定在与底座下皮不大于20㎝处的立杆上。横向扫地杆应采用直角扣件固定在紧靠纵向扫地杆下方的立杆上,当立杆基础不在同一高度上时,必须将高处的纵向扫地杆向低处延长两跨立杆固定。靠边坡的立杆轴线到边坡的距离不小于50㎝。(三)架体与建筑结构拉结1.脚手架一般搭设都比较高,而架体宽度仅在1.2m左右,形成长细比失调。再则,搭设中的立杆很难保证垂直。偏心力距大,加大了脚手架失稳的比重,因此架设拉结点使架体与建筑结构连接一体形成整体,从实际情况看造成架体变形、倾覆主要原因之一就是拉结点稀少和人为的在装修外墙、安装窗