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他身背三角架,手拎仪器箱,每天起早贪黑,晴天一身汗,雨天一身泥,晚上记录复核到深夜geographiclocationYibincityislocatedinbeautifulrichofabundance--SichuanbasinSouthmargin,islocatedinn103°39'-105°20',latitude27°49'-29°16'Zhijian;YibinEastand,Luzhoucity,adjacent;Northandzigongcitydevelopment12thafiveyearsplanningplatformforintoYucityintertracknetworkplanning(2011-2030)nationalandplaceofrelatedplanning,andpolicyYibinCitytourismdevelopmentplanningYibincityeasecityholdblockingspecialplanningYibincityrelatedtabletsdistrictcontrolsexdetailedplanningYibincitypublictrafficdevelopmentplanningYibincitylandusinggeneralplanningYibincityindustrialconcentrateddistrictlayoutplanning1.4planningbackgroundYibincityinsandsRiver,andminjiangRiverandYangtzeRiverofSanjiangintersectionat,isChinafamousofwineare,belongstochuan,andYunnan,andGuizhouthreeprovincecombinedDepartmentarea,knownasYangtzeRiverCity,said,isinpanxi-liupanshuiimportantpartoftheresource-richregion.Inthenewmasterplan,asthenationalhistoricalandculturalcityinYibincity,China,DepartmentofSichuan-Yunnan-Guizhou-basedregionalcenterintheupperreachesCountiesare:Yibin,andJiang'an,andchangningCounty,andGaoPingshanCounty,xingwenjunlian,andGong,and,and,and.2.1-2administrativemapofYibin,Yibincity,endof2014thecity'stotalpopulationof5.5429millionpeople,residentpopulationof825,000peopleintheCenter.2.1.3socialeconomicdevelopmentinYibincity,2014toachieveGDPof144.381billionyuan,anincreaseof8%,keepingthetotalprovince-4thplace;localpublicbudgetincomeof10.56billionyuan,ranking4thplace,above-scaleindustrialaddedvalueof78.716billionyuan,ranking3rdinsocialretailsalesofconsumergoodstotaled56.169billionyuan,ranking4thin24990Yuanofdisposableincomepercapitaofurbanresidents,percapitanetincomeoffarmers9831,Share12314.5:60.0:25.5.Wine-makingindustry,交底内容:25.1一般规定25.1.1适用范围本规程适用于工业与民用建筑避雷引下线,均压环(带)的安装及变配电室接地干线的敷设。25.1.2避雷引下线和变配电室接地干线安装工程应按已批准的设计进行施工。25.1.3避雷引下线不应少于两根,但周长不超过25m高度不超过40m的建筑物,且为三类防雷建筑物可只设1根引下线。引下线应沿建筑物四周均匀或对称布置,其间距不得大于25m,当仅利用建筑物四周的钢柱或柱子钢筋作为引下线时,可按跨度设引下线,但引下线的平均间距不应大于25m。25.1.4避雷引下线安装应符合以下要求:1.明装敷设引下线截面,采用热浸镀锌圆钢时其直径不得小于8mm,采用热浸镀锌扁钢时其截不得小于12×4。引下线应沿最短路线引至接地体,弯曲处R半径应大于等于圆钢直径或扁钢厚度的10倍。明装引下线距墙面≤90mm,每隔1.5~2m应设置支持架固定。2.暗装引下线利用钢筋混凝土板梁、柱钢筋作为引下线,和外引预埋连接板,引下线与钢筋的连接应焊接或采用螺栓紧固的U形卡子连接。利用混凝土柱钢筋作引下线不少于φ10mm2根主筋,利用金属构件铁爬梯等作引下线,构件之间必须连接成电气通路。25.1.5引下线接地测试点的设置明装应设断接卡子,距地高度为1.5~1.8m,断接卡子以下应设钢管或角钢保护,暗装可引到断接卡子箱或连接板检测点或地下接地电阻检测点,见图24.3.6.1~3,具体位置或高度由设计确定。25.1.6避雷引下线,接地干线,在容易受机械损伤的部位,应加钢管或角钢保护,在穿越楼板或墙时应加套管保护,跨越伸缩缝时应做Ω弯补偿。25.1.7避雷引下线或接地干线所使用的钢材或支持件均应经热浸镀锌。25.1.8接地引下线的焊接应符合24.1.7条的规定。25.1.9当电缆穿过零序电流互感器时,电缆头的接地线应通过零序电流互感器后接地;由电缆头至穿过零序电流互感器的一段电缆金属护层和接地线应对地绝缘。25.1.10配电间隔和静止补偿装置的栅栏门及变配电室金属门铰链处的接地连接,应采用编织铜线。变配电室的避雷器应用最短的接地线与接地干线连接。25.1.11设计要求接地的幕墙金属框架和建筑物的金属门窗,应就近与接地干线连接可靠,连接处不同金属间应有防电化腐蚀措施。铜线接头,应挂锡。25.2施工准备25.2.1技术准备1.按照已批准的施工组织设计(施工方案)进行技术交底。2.按施工图设计检查引下线均压环(带)和变电室接地干线的敷设位置是否和建筑物他身背三角架,手拎仪器箱,每天起早贪黑,晴天一身汗,雨天一身泥,晚上记录复核到深夜geographiclocationYibincityislocatedinbeautifulrichofabundance--SichuanbasinSouthmargin,islocatedinn103°39'-105°20',latitude27°49'-29°16'Zhijian;YibinEastand,Luzhoucity,adjacent;Northandzigongcitydevelopment12thafiveyearsplanningplatformforintoYucityintertracknetworkplanning(2011-2030)nationalandplaceofrelatedplanning,andpolicyYibinCitytourismdevelopmentplanningYibincityeasecityholdblockingspecialplanningYibincityrelatedtabletsdistrictcontrolsexdetailedplanningYibincitypublictrafficdevelopmentplanningYibincitylandusinggeneralplanningYibincityindustrialconcentrateddistrictlayoutplanning1.4planningbackgroundYibincityinsandsRiver,andminjiangRiverandYangtzeRiverofSanjiangintersectionat,isChinafamousofwineare,belongstochuan,andYunnan,andGuizhouthreeprovincecombinedDepartmentarea,knownasYangtzeRiverCity,said,isinpanxi-liupanshuiimportantpartoftheresource-richregion.Inthenewmasterplan,asthenationalhistoricalandculturalcityinYibincity,China,DepartmentofSichuan-Yunnan-Guizhou-basedregionalcenterintheupperreachesCountiesare:Yibin,andJiang'an,andchangningCounty,andGaoPingshanCounty,xingwenjunlian,andGong,and,and,and.2.1-2administrativemapofYibin,Yibincity,endof2014thecity'stotalpopulationof5.5429millionpeople,residentpopulationof825,000peopleintheCenter.2.1.3socialeconomicdevelopmentinYibincity,2014toachieveGDPof144.381billionyuan,anincreaseof8%,keepingthetotalprovince-4thplace;localpublicbudgetincomeof10.56billionyuan,ranking4thplace,above-scaleindustrialaddedvalueof78.716billionyuan,ranking3rdinsocialretailsalesofconsumergoodstotaled56.169billionyuan,ranking4thin24990Yuanofdisposableincomepercapitaofurbanresidents,percapitanetincomeoffarmers9831,Share12314.5:60.0:25.5.Wine-makingindustry,相符,是否与其他管道和设备位置冲突而无法施工,应与监理工程师(建设单位专业技术负责人)、设计单位及时协商,采取措施。25.2.2施工机具准备1.主要安装施工机具主要安装机具包括电焊机、电锤、钢锯、钢丝刷、毛刷、活扳手、手锤、手钳、线缍小白线绳或尼龙线。2.检测工具检测工具包括卷尺、小白线绳或尼龙线、线锤。25.2.3作业条件1.防雷引下线敷设时建筑物(构筑物)有脚手架爬梯或吊笼,能达到上人安全操作的条件。2.明敷引下线主体工程已结束。3.暗敷引下线,利用建筑物钢筋作引下线部分钢筋绑扎已结束,在墙面暗敷引下线,主体工程结束。4.变配电室接地干线敷设,土建工程主体结束,地面已完工。25.2.4材料准备1.引下线及接地干线用的热浸镀锌圆钢和扁钢已备齐。2.引下线及变配电室接地干线用的支持件、紧固件均已热浸镀锌备齐。3.其他材料电焊条、保护引下线和变配电室接地干线的钢管或角钢等材料已备齐,紧固件、断接箱等已备齐。25.3施工工艺25.3.1工艺流程1.明装引下线安装避雷支架、断接卡子制作→定位放线→支持卡子安装→引子线→敷设→断
本文标题:避雷引下线安装范文
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