【正文】 華東177。1100kV特高壓直流輸電線路工程桿塔設(shè)計(jì)原則作者：日期：準(zhǔn)東 華東177。1100kV特高壓直流輸電線路工程桿塔設(shè)計(jì)原則國家電網(wǎng)公司直流建設(shè)部二○一五年十月目 錄1 工程概況 .............................................................................................................................................12 技術(shù)標(biāo)準(zhǔn)和規(guī)程規(guī)范 ..........................................................................................................................13 電氣條件 .............................................................................................................................................2 氣象條件組合 ......................................................................................................................................2 導(dǎo)地線方案及參數(shù) ............................................................................................................................13 計(jì)算用最大風(fēng)速 ................................................................................................................................14 空氣間隙 ............................................................................................................................................15 極間距取值 ........................................................................................................................................16 絕緣子串型及參數(shù) ............................................................................................................................17 導(dǎo)地線布置方式 ................................................................................................................................26 防雷保護(hù) ............................................................................................................................................264 桿塔型式和桿塔規(guī)劃 ........................................................................................................................27 桿塔型式 ............................................................................................................................................27 桿塔規(guī)劃 ............................................................................................................................................275 荷載計(jì)算 ...........................................................................................................................................50 導(dǎo)地線風(fēng)荷載計(jì)算 ............................................................................................................................50 絕緣子及金具荷載 ............................................................................................................................51 桿塔荷載條件 ....................................................................................................................................52 電氣荷載表 ........................................................................................................................................53 桿塔荷載計(jì)算 ....................................................................................................................................53 荷載組合 ............................................................................................................................................576 桿塔設(shè)計(jì) ...........................................................................................................................................59 構(gòu)造要求 ............................................................................................................................................59 桿塔材料的使用 ................................................................................................................................61 特殊桿塔設(shè)計(jì) ....................................................................................................................................63 鐵塔與基礎(chǔ)連接設(shè)計(jì) ........................................................................................................................65附錄1 角鋼構(gòu)件軸心受力強(qiáng)度與穩(wěn)定計(jì)算 .........................................................................................69附錄2 耐張塔45度大風(fēng)工況計(jì)算 ........................................................................................................71附錄3 鐵塔計(jì)算工況組合 ...................................................................................................................74表1 10 MM冰區(qū)懸垂直線塔計(jì)算工況匯總 ..............................................................................................74表2 10 MM冰區(qū)懸垂轉(zhuǎn)角塔計(jì)算工況匯總 ..............................................................................................75表3 10 MM冰區(qū)耐張塔計(jì)算工況匯總 ......................................................................................................76表4 10 MM冰區(qū)加強(qiáng)型懸垂直線塔計(jì)算工況匯總 ...................................................................................78表5 15 MM中冰區(qū)懸垂直線塔計(jì)算工況匯總 ..........................................................................................79表6 15 MM中冰區(qū)懸垂轉(zhuǎn)角塔計(jì)算工況匯總 ..........................................................................................80表7 15 MM中冰區(qū)耐張塔計(jì)算工況匯總 ..................................................................................................82表8 單極 終端塔計(jì)算工況匯總 ................................................................................................................84表9 重冰區(qū)懸垂直線塔荷載組合 ............................................................................................................87表10 重冰區(qū)耐張塔荷載組合 ...................................................................................................................881 工程概況準(zhǔn)東華東177。1100kV特高壓直流輸電線路工程起于新疆準(zhǔn)東五彩灣換流站，止于安徽皖南換流站，輸送容量12022MW。，初設(shè)（）。線路途經(jīng)新疆、甘肅、寧夏、陜西、河南、安徽六省區(qū)，其中新疆境內(nèi)約614km，，陜西境內(nèi)約404km。沿線海拔0m～2400m之間，地形比例為：％，％，％，高山大嶺4％，河網(wǎng)/％，％。設(shè)計(jì)基準(zhǔn)風(fēng)速取27m/s、29m/s、30m/s、31m/s、32m/s、33m/s、36m/s、37m/s、38m/s、41m/s、43m/s等十一種。設(shè)計(jì)覆冰取5mm、10mm、15mm、20mm、30mm五種。本工程在5mm、10mm冰區(qū)平丘地段采用8JL/G3A－1250/70鋼芯鋁絞線；10mm冰區(qū)山區(qū)、15mm、20mm（重）冰區(qū)段采用8JL/G2A－1250/100鋼芯鋁絞線，30mm冰區(qū)采用8JLHA4/G2A－1250/100鋼芯中強(qiáng)度鋁合金導(dǎo)線。地線一根地線采用JLB20A240鋁包鋼絞線，另一根地線采用OPGW240復(fù)合光纜。長江大跨越導(dǎo)線采用6JLHA1/G4A900/240特強(qiáng)鋼芯高強(qiáng)鋁合金絞線。復(fù)合