接地施工方案(模版)(11頁).doc
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2022-08-12
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1、海陽核電嶗山500kV輸電線路工程接地施工方案吉林省送變電工程公司海陽核電嶗山500kV輸電線路工程施工項目部2013年7月15日批準人: 年 月 日審核人: 年 月 日編制人: 年 月 日目錄一、編制依據1二、工程概況1三、施工準備11.施工工器具準備12.接地材料準備1四、接地施工21、接地溝開挖22、接地體連接33.接地體安裝34.接地電阻測量4一、 編制依據1、海陽核電嶗山500kV線路工程-接地施工圖(100-SA07511S-D0201)2、110kV500kV架空電力線路施工及驗收規范(GB502332005)3、鋼筋焊接及驗收規范(JGJ182003)4、電力建設安全工作規程(2、架空電力線路部分)(DL5009.2-2004)5、交流電氣裝置的接地DL/T621-1997二、 工程概況海陽核電嶗山500kV輸電線路工程,地形主要以平地及丘陵為主,有少部分山地;塔基接地數量109基,接地型式有:JD1、JD2、TF5、TF5A、TF10、TF10A、TF20、TF20A,共計8種接地型。三、 施工準備1. 施工工器具準備電焊機、開挖工具(鐵鍬、鋼釬)2. 接地材料準備接地引下線以及接地體均采用熱鍍鋅12圓鋼,部分基礎接地采用降阻劑,具體長度用量見附件1:接地施工統計表每基另有:704120聯板4塊;M1637螺栓、防卸碗及墊圈8個;10米接地引下線(鍍鋅12圓鋼2.5m3、4)四、 接地施工1、接地溝開挖(1) 接地裝置距基礎邊沿按1米考慮,可適當調整;塔位明細表中接地裝置為預測裝置,施工時S隨塔基尺寸不同而定,S變化時調整L,使其總長度不變。(2) 接地溝開挖的槽位,應避開道路、地下管道及電纜等,如遇有地下光纜、輸油管道等障礙物,接地裝置射線需朝遠離障礙物的方向敷設。(3) 平地、丘陵地區不小于0.8m;地表為土質的山區不小于0.6m;地表為巖石的山區不小于0.3m;接地溝寬度0.4米。(4) 施工圖中土方按0.8m深度、0.5m寬度計算。2、 接地體連接(1)接地圓鋼的連接采用搭接方式,焊縫長度100mm,雙面焊縫;引上線及聯板加工焊好后鍍鋅。(2)連接前應4、清除連接部位的鐵銹;接地體間連接必須可靠。(3)除設計規定的斷開點可用螺栓連接外,其余應用焊接連接; 中等腐蝕地段及強腐蝕地段,接地裝置的接地體需涂刷防腐導電涂料。對接地裝置的焊接點處采取涂刷防腐導電涂料的防腐措施,涂刷三遍導電防腐涂料,接地體表面不得有水份,泥沙,鐵銹等,并清除焊點焊渣,以保證涂料的粘附強度,施工工藝由防腐涂料廠提供。每基塔按配置的接地型號將接地體按說明全部埋人,不得減少,接地裝置敷設完畢后,應實測每基鐵塔的工頻接地電阻值,工頻接地電阻值應滿足施工圖紙的要求,當所測得的接地電阻未滿足要求時,應在已敷設的接地裝置上加埋接地圓鋼直至滿足設計要求,當加長后接地體總長度達到后一型接地5、裝置的長度時,則按后一型接地裝置所要求的電阻值驗收。3. 接地體安裝(1) 用于插入式角鋼時,引上線應平行主材,避開斜材連板并保持順直。(2) 初始安裝時,接地聯板的兩個孔均通過螺栓與塔腿相連。(3) 鐵塔接地裝置與鄰近設施接地體接近時,為防止反擊,兩接地體的最近距離不宜小于5m。(4) 接地體間連接必須可靠。(5) 接地體間連接必須可靠。(6) 接地裝置應按設計圖敷設,受地質地形條件限制時方框尺寸可根據鐵塔根開適當增減,但接地圓鋼的總長度不變,接地體邊框與基礎立柱的最小距離應大于0.5米。但不論修改與否均應在施工記錄上繪制接地裝置敷設簡圖并標示相對位置和尺寸。(7) 降阻劑施工:在溝底墊106、cm左右回填土整平,澆水將坑底土壤濕潤,將熱鍍鋅圓鋼拉直置于溝中,降阻劑加50的水攪拌成稠糊狀,均勻地包裹在接地體周圍,覆蓋嚴實,接地體的等效直徑為16cm,靜止30分鐘,待表面凝固后,回填土并夯實。降阻劑應選用長效防腐物理性降阻劑。(8) 接地電阻測量(1) 測量接地電阻可采用接地搖表。所測得的接地電阻值不應大于設計規定值。(2) 實測每基接地裝置的接地電阻,測量時與地線絕緣。(3) 如果測量電阻值達不到要求,應延長射線直至工頻電阻R值滿足要求時為止,但每根射線長度不超過60m。(4) 設計允許最大電阻值見圖紙或附件1:接地施工統計表附件1:接地施工統計表桿塔號接地型號S方環邊長L射線長射線7、根數總長度總重量接地極數量土方量允許電阻118TF10A20214164145.61065.620119JD218304192170.52456.430120JD218304192170.52456.430121JD218304192170.52456.430122JD218304192170.52456.430123JD218304192170.52456.430124JD218304192170.52456.430125JD218304192170.52456.430126JD218304192170.52456.430127TF51513411299.52044.815128JD21838、04192170.52456.430129TF5A208411299.52044.815130TF51513411299.52044.815131TF5A208411299.52044.815132TF51513411299.52044.815133TF51513411299.52044.815134JD218304192170.52456.430135JD218304192170.52456.430136JD218304192170.52456.430137JD218304192170.52456.430138JD218304192170.52456.430139JD2183041921709、.52456.430140JD218304192170.52456.430141JD218304192170.52456.430142JD218304192170.52456.430143JD218304192170.52456.430144JD218304192170.52456.430145JD218304192170.52456.430146TF51513411299.52044.815147TF51513411299.52044.815148TF51513411299.52044.815149TF51513411299.52044.815150TF10A20214164145.610610、5.620151JD218304192170.52456.430152TF51513411299.52044.815153JD218304192170.52456.430154TF51513411299.52044.815155JD118254172152.742049.3625156JD118254172152.742049.3625157JD118254172152.742049.3625158TF10A20214164145.61065.620159TF5A208411299.52044.815160JD118254172152.742049.3625161JD218304192170.11、52456.430162JD218304192170.52456.430163JD218304192170.52456.430164JD218304192170.52456.430165JD218304192170.52456.430166JD218304192170.52456.430167JD218304192170.52456.430168TF2015504260231010425169TF5A208411299.52044.815170TF51513411299.52044.815171TF10A20214164145.61065.620172TF51513411299.52044.812、15173TF10A20214164145.61065.620174TF51513411299.52044.815175JD218304192170.52456.430176JD218304192170.52456.430177JD218304192170.52456.430178TF2015504260231010425179JD218304192170.52456.430180JD218304192170.52456.430181JD218304192170.52456.430182JD218304192170.52456.430183TF2015504260231010425184TF113、015264164145.61065.620185TF51513411299.52044.815186TF1015264164145.61065.620187TF5A208411299.52044.815188TF51513411299.52044.815189TF20A20454260231010425190JD218304192170.52456.430191JD218304192170.52456.430192JD218304192170.52456.430193JD218304192170.52456.430194JD218304192170.52456.430195JD218304114、92170.52456.430196JD218304192170.52456.430197JD218304192170.52456.430198JD218304192170.52456.430199JD218304192170.52456.430200TF1015264164145.61065.620201TF10A20214164145.61065.620202TF51513411299.52044.815203TF51513411299.52044.815204TF51513411299.52044.815205JD218304192170.52456.430206TF515134112915、9.52044.815207TF51513411299.52044.815208TF51513411299.52044.815209TF51513411299.52044.815210TF5A208411299.52044.815211TF5A208411299.52044.815212TF51513411299.52044.815213TF51513411299.52044.815214TF10A20214164145.61065.620215TF51513411299.52044.815216TF51513411299.52044.815217TF5A208411299.52044.815218TF2015504260231010425219JD218304192170.52456.430220JD218304192170.52456.430221TF10A20214164145.61065.620222TF51513411299.52044.815223JD218304192170.52456.430224JD218304192170.52456.430225TF51513411299.52044.815226TF10A20214164145.61065.620