接地装置安装施工工艺.doc

16  接地装置安装
    16.1  总    则
    16.1.1  适用范围
    本章适用于一般工业与民用建筑防雷接地、保护接地、工作接地、重复接地及屏蔽接地装置安装工程。
    16.1.2  编制参考标准及规范
    (1)《建筑电气工程施工质量验收规范》(GB 50303-2002)；
    (2)《建筑设备安装分项工程施工工艺标准》；
    (3)《建筑安装工程施工图集》。
    16.2  术语、符号
    接地装置：是指将雷电流或设备漏电电流导人大地的装置，一般由接地线和接地体组成。
    16.3  基本规定
    (1) 接地装置的埋设深度其顶部不应小于0.6m，角钢及钢管接地极应垂直配置。
    (2) 垂直接地极长度不应小于2.5m，其相互之间的间距如设计无要求，一般不小于5m。
    (3) 接地装置埋设位置距建筑物不宜小于1.5m，遇在垃圾灰渣等处埋设接地装置时，应换土并分层夯实。
    (4) 当接地装置必须埋设在距建筑物出人口或人行道小于3m时，应采用均压带做法或在接地装置上面0.2m处敷设50～90mm厚的沥青层，其宽度应超过接地装置2m。通过人行通道的接地装置埋深大于3m时，可不设沥青层。
    (5) 接地干线的连接应采用焊接，焊接处焊缝应饱满，并有足够的机械强度，不得有夹渣、咬肉、裂纹、虚焊、气孔等缺陷，焊接处的药皮敲净后，刷沥青做防腐处理。
    (6) 明敷设接地干线穿墙时，应加套管保护，跨越伸缩
16 Grounding Installation
    16.1 General
    16.1.1 Scope
    This chapter applies to general industrial and civil buildings lightning protection and grounding, protective grounding, grounding work, repeat the grounding and shielding earthing installation.
    16.1.2 the preparation of reference standards and norms
    (1) "Building Electrical Engineering Construction Quality Acceptance" (GB 50303-2002);
    (2) "Construction equipment Construction Technology Installation sub-standard";
    (3) "Atlas of construction and installation works."
    16.2 The terms, symbols
    Grounding device: refers to the lightning current leaders or equipment earth leakage current device, generally composed of ground wire and grounding.
    16.3 Basic requirements
    (1) the depth of the buried grounding devices should not be less than the top 0.6m, angle steel and steel grounding should be vertical configuration.
    (2) the length of vertical grounding should not be less than 2.5m, the distance between each other, such as its design is not required, generally not less than 5m.
    (3) distance to the building grounding devices should not be planted less than 1.5m, the event in the waste ash buried grounding device, etc., should be replaced and layered soil compaction.
    (4) When the grounding device must be laid out in the population away from the building or sidewalk is less than 3m, all pressure should be used with the practice or device in the ground above the 0.2m be laid 50 ~ 90mm thick asphalt layer, its width should be more than grounding device 2m. Pedestrian access through the depth of the grounding device is greater than 3m, from time to design asphalt layer.
    (5) Route the connection should be grounded welding, welding seam to be full, and have sufficient mechanical strength, not a slag, biting flesh, crack, Weld, porosity and other defects, welding knocking the net after a drug Paper , brush asphalt do embalmed.
    (6) clearly laid ground lines through the wall should be added casing protection, stretching across