【正文】 1 substation and a new substation. This is the power, control and grounding cable pulling among three substations and for MV users connected to the three substations. 施工范圍 Scope of Work1) A472 建筑（220/35kV 變電站）出線回路：A472 Building(220/35kV substation) outlet circuit由 A472 變電站引出 3 路 35kV 出線。Pull three 35V outgoings from A472 substation. Of which: The first outgoing is led to B301S Building (35/10kV substation) the original one main transformer, pull the original one main transformer cable out, and connect to the adding 4 main transformer。Pull 7 10kV outgoings from B301S substation to B399central refrigeration station. Loop uses 10kV threecore armored cable with crosssection 95mm2 and pull out from the existing cable well in the south of B301S then buried lay to the device. 3) C581 建筑（35/10kV 變電站）出線回路：C581 building (35/10kV substation) outlet circuit:由 C581 引出 10 路 10kV 線路，分別為 A507 的四臺變壓器，B551 的兩臺變壓器，B553TDA 裝置氫氣壓縮機(jī) 2 臺，C521 鹽酸裝置氯氣壓縮機(jī) 1 臺，鹽酸壓縮機(jī) 1 臺提供電源。s four transformers, B551 two transformers, B553TDA 2 sets of hydrogen pressor unit, C521 hydrochloric acid chlorine gas pressor unit, and hydrochloric acid pressor unit respectively. Among them, transformer circuit uses x 3core armored cable with 10kV crosssection 185mm2, motor circuit uses threecore armored cable with 10kV crosssection 95mm2. All cable lines will be laid underground along the planning path.4) 接地電纜回路：Ground cable loop: 從 A472 敷設(shè)一根 95mm2 裸銅線去 C581，同時從 C581 敷設(shè)四根 95mm2 裸銅線，分別引至B55 A50B553 和 C521，作等電位聯(lián)結(jié)。其中，10* 電纜直接接至溫控箱，4* 電纜可集中從某間變壓器室引出，沿橋架至相關(guān) PCS 樓 ATS 柜。具體如下：In this pilation process, strictly implement current national construction and installation construction, acceptance norms, procedures, standards, and design specifications. As follows:《電氣裝置安裝工程電纜線路施工及驗收規(guī)范 GB501682022 》Electrical installation cable construction and acceptance standards GB501682022 《電氣裝置安裝工程接地裝置施工及驗收規(guī)范 GB501692022 》Electrical installation earthing construction and acceptance standard GB501692022 《建筑電氣工程施工質(zhì)量驗收規(guī)范 GB50303—2022 》Building Electrical Construction Quality Acceptance GB503032022三． 施工工藝流程：Construction Process前期準(zhǔn)備→電纜直埋敷設(shè)施工→鋪沙蓋磚→回填土→埋標(biāo)志樁→掛標(biāo)志牌Preparation→ Cable buried pulling →spread sand and build bricks → backfill→bury sign stake→ hang signs 四. 前期準(zhǔn)備 Preparation 技術(shù)準(zhǔn)備 Technical Preparation1） 針對本工程特點(diǎn)編審詳細(xì)的電纜溝施工作業(yè)指導(dǎo)書，及時組織圖紙會審。All material specifications, models and voltage level should meet design requirements and have product certificates. 2) 每盤電纜上應(yīng)標(biāo)明電纜規(guī)格、型號、電壓等級、長度及出廠日期。 The cable exterior condition is intact .The armor has no rust and no mechanical damage. It is shiny and bright without wrinkles and distortions. Cable jacket and insulation show no aging and cracks.4) 電纜敷設(shè)前進(jìn)行絕緣搖測或耐壓試驗。Calculate each cable length according to design and actual path. Arrange each cable reasonably without cable joints. 6) 電纜保護(hù)套管已經(jīng)預(yù)埋好，故只需要清理管內(nèi)殘渣，并作好管口保護(hù)。Insulation shake watch, measuring tape, hacksaw, cableside wiring tools, hand hammers, wrenches, electric welding tools, electrical tools, bending machine, grinding wheel machine, printer, cable plate machine, blowtorch. 無線電對講機(jī)、手持?jǐn)U音喇叭。Cable laying equipment has placed, and meets safety requirements. Cable lighting illumination along the route meets the construction requirements.五. 敷設(shè)施工 Work of Cable Pulling 電纜敷設(shè)施工工序 Work Procedure機(jī)具布置→電纜展放→電纜敷設(shè)、固定 Equipment layout → Lay off cable→lay cable and fix 機(jī)具布置 Layout of Tools 電纜的搬運(yùn)及支架架設(shè) Cable Removal and Cable Tray 1) 電纜搬運(yùn)須用卡車或吊車運(yùn)輸。架設(shè)時，應(yīng)注意電纜軸的轉(zhuǎn)動方向，電纜引出端應(yīng)在電纜軸的上方。卷揚(yáng)機(jī)用地錨固定，轉(zhuǎn)角滑輪用鋼管固定，平面滑輪無需固定。 Use manual or mechanical traction. When using mechanical traction, the maximum mechanical strength should meet the requirements in Table, its speed should not exceed 15m/min, and should install fortified twister between traction head or steel mesh sleeve and pulling steel cable. Cable maximum traction strength (N/mm2)10 / 14電纜最大牽引強(qiáng)度（ N/mm2）牽引方式 traction 牽引頭 traction head 鋼絲網(wǎng)套 steel mesh sleeve 受力部位force area銅芯lead core 鋁芯aluminum core鉛套lead sheath鋁套aluminum sheath塑料護(hù)套plastic sheath 允許牽引強(qiáng)度allowable traction strength70 40 10 40 7本次采用機(jī)械牽引，采用鋼絲網(wǎng)套直接塑料護(hù)套方式，按表計算允許最大牽引強(qiáng)度： The mechanical traction uses aluminum and plastic sheath. Calculate allowable maximum traction strength: 35KV 電纜：300mm 2 的單芯電纜，其允許最大牽引強(qiáng)度：35KV cable: 300mm2 single cable, the allowable maximum traction strength:F1=7*300=2100N10KV 電纜：95mm 2 的三芯鎧裝電纜，鉛套，其允許最大牽引強(qiáng)度：10KV cable: 95mm2 threecore armored cable, lead sheath, the allowable maximum traction strength:F2=10*95*3=2850N185mm2 的三芯鎧裝電纜，鉛套，其允許最大牽引強(qiáng)度：185mm2 threecore armored cable, lead sheath, the allowable maximum traction strength:F3=10*185*3=5550N2）牽引力和側(cè)壓力計算：Traction and lateral pressure calculation:側(cè)壓力計算公式為：The calculating formula lateral pressure: P=T/R 式中：P 為側(cè)壓力（N/m ） ；T