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目 录
一、工程概况 ··································································································· 1 二、编制依据 ··································································································· 1 三、设备清单、线路负荷计算及选取导线截面 ························································· 1
3.1镇龙站 ················································································································· 2 3.2存车线及项目部驻地 ······························································································· 3 3.3施工竖井 ·············································································································· 4 3.4中新站（盾构出口处） ···························································································· 4
四、主干线路负荷计算，选取导线载面 ·································································· 5
4.1主要设备线路负荷计算收及导线截面选取 ···································································· 5 4.2盾构机线路负荷计算收及导线截面选取 ······································································· 7
五、变压器的选择 ····························································································· 8
5.1普通变压器的选择 ·································································································· 8 5.2盾构专用变压器的选择 ·························································································· 10
六、各电箱开关的选择 ····················································································· 10 七、漏电保护 ································································································· 10 八、供电系统配电方式 ····················································································· 10 九、接地保护及防雷措施 ··················································································· 11
9.1接点保护 ············································································································· 11 9.2防雷装置 ············································································································· 11
十、临时用电的施工 ························································································ 12
10.1电缆及其附件选择 ······························································································ 12 10.2高低压配电盘（箱、柜）的安装 ············································································· 12
十一、临时用电平面布置图 ··············································································· 13 十二、盾构施工用电系统图 ··············································································· 13 十三、洞内高低压电缆敷设、盾构机高压电缆接头制作 ··········································· 13
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13.1电缆敷设 ·········································································································· 13 13.2电缆头制作 ······································································································· 13 13.3洞内高低压电缆及照明布置图················································································ 13
十四、施工现场临时用电管理组织机构图 ····························································· 14 十五、用电安全技术措施和电气防火安全技术措施 ················································· 15
15.1用电安技术措施 ································································································· 15 15.2电气防火安全技术措施 ························································································ 23
十六、施工现场临时停电应急措施 ······································································ 25
16.1制定目的 ·········································································································· 25 16.2临时用电停电应急措施 ························································································ 25 16.3突发性停电的应急措施 ························································································ 25 16.4接到停电通知的应急措施 ····················································································· 26
十七、触电事故应急预案 ·················································································· 26
17.1应急措施 ·········································································································· 26 17.2应急物资 ·········································································································· 27
十八、建立施工用电管理档案 ············································································ 27 附件： ·········································································································· 28
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一、工程概况
广州市轨道交通二十一号线【施工15标】土建工程起讫里程为YDK36+351.800～YDK38+398.000，线路全长约2.046km。主要施工项目包括镇龙站（含通道、出入口、风道、风亭），镇龙站～中新站区间（含联络通道、施工竖井）土建工程，其中镇龙站采用明挖法施工，建筑总面积为34887m2；镇龙站～中新站区间左右线长分别为1681.593m（长链2.565m）、1679.028m，采用矿山法和盾构法施工。区间设置2座联络通道，在广汕公路北侧山脚（里程YDK37+419.000）设置1处施工竖井。
二、编制依据
1、广州市轨道交通二十一号线工程图纸（镇龙站及区间）； 2、《建设工程施工现场供用电安全规范》 GB50194—1993； 3、《低压配电设计规范》 GB50054—2011； 4、《供配电系统设计规范》 GB50052—2009； 5、《通用用电设备配电设计规范》 GB50055—2011； 6、《建筑施工安全检查标准》 JGJ 59-2011； 7、《施工现场临时用电安全技术规范》 JGJ46—2005；
三、设备清单、线路负荷计算及选取导线截面
本工程用电设备较多，采用需要系数法进行负荷计算。各设备的主要参数通过查表取得，负荷计算见附表，电缆载流量对照表3-1。
为了保证工程的顺利进行，现场设置200KW移动发电机一台，作为施工高峰期容量不足时的备用电源或停电时工地照明、地下照明的备用电源。
表3-1聚氯乙烯绝缘电力电缆载流量 非铠装 标称截面mm2 1.5 2.5 4 6 在空气中 铜 15 21 26 37 铝 - 16 21 25 在地下 铜 20 28 34 45 铝 - 21 27 33 在空气中 铜 - - 25 36 铝 - - 21 25 铠装 在地下 铜 - - 33 44 铝 - - 26 32
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10 16 25 35 50 70 95 120 150 185 240 300 46 60 82 108 134 165 203 236 281 328 367 418 36 47 64 84 100 124 156 183 214 246 268 330 56 72 95 123 151 181 216 246 287 334 374 428 43 55 75 96 113 136 165 192 219 251 275 341 45 58 80 107 132 162 200 230 275 318 352 401 34 45 62 82 98 122 152 180 208 236 253 314 54 70 95 121 149 180 212 241 280 324 360 412 41 53 74 94 110 135 161 187 212 241 261 325 1、本表适用于0.6/1kv3+2 芯4+1 芯 5 芯聚氯乙烯绝缘电力电缆载流量
2、适用型号VV,,VLV,,VV22,,VLV22,,,导电线芯最高工作温度70℃ 3、空气温度30℃，土壤温度25℃，土壤热阻系数：1.2℃ 3.1镇龙站
表3.1-1 镇龙车站设备、支路线截面选择 序 号 1 2 3 4 5 6 7 8 9 10 设备名称 钢筋调直机 钢筋切断机 钢筋弯曲机 空压机 水泵 45T龙门吊 砼喷射机 电焊机 双轴水泥搅拌桩机 砼振捣器 数量 1 1 1 2 5 2 2 2 2 3 功率 KW/台 5.5 3 3 7.5 30 150 22 30 150 2.2 合计功率KW 5.5 3 3 15 150 300 44 60 300 6.6 导线载面积 VLV 3x4+2x2.5mm2 VLV 3x4+2x2.5mm2 VLV 3x4+2x2.5mm2 VLV 3x4+2x2.5mm2 VLV 3x16+2x10mm2 VLV 3x185+2x95mm2 VLV 3x10+2x6mm2 VLV 3x16+2x10mm2 VLV 3x185+2x95mm2 VLV 3x4+2x2.5mm2
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11 12 合计 热风自动焊接机 塔吊 2 3 30 90 60 270 1217.1 VLV 3x16+2x10mm VLV 3x95+2x50mm2 23.2存车线及项目部驻地
表3.2-1 存车线和项目部驻地用电设备、支路线截面选择 序 号 1 2 3 4 5 6 7 8 9 10 ∑1～10 11 12 13 14 15 16 17 设备名称 钢筋调直机 钢筋切断机 钢筋弯曲机 10T龙门吊 电焊机 冲击钻机 双管旋喷桩机 砼振捣器 砂浆搅拌机 通风机 1.5p空调 3P空调 饮水机 笔记本 打（复）印机 照明 厨房设备 数量 1 1 1 1 2 4 2 3 1 2 47 6 45 40 8 300 4 功率 KW/台 5.5 3 3 50 30 75 150 2.2 2.5 80 1.3 2.1 0.5 0.07 0.2 0.036 2 合计功率KW 5.5 3 3 50 60 300 300 6.6 2.5 160 890.6 61.1 12.6 22.5 2.8 1.6 10.8 8 导线载面积 VLV 3x4+2x2.5mm2 VLV 3x4+2x2.5mm2 VLV 3x4+2x2.5mm2 VLV 3x36+2x16mm2 VLV 3x16+2x10mm2 VLV 3x70+2x35mm2 VLV 3x185+2x95mm2 VLV 3x4+2x2.5mm2 VLV 3x4+2x2.5mm2 VLV 3x70+2x35mm2 BV 4mm2 BV 4mm2 BV 4mm2 BV 4mm2 BV 4mm2 BV 2.5mm2 BV 4mm2
地铁车站及盾构区间临时用电方案
