接地裝置安裝施工工藝.doc

16  接地裝置安裝
    16.1  總    則
    16.1.1  適用范圍
    本章適用于一般工業(yè)與民用建筑防雷接地、保護接地、工作接地、重復接地及屏蔽接地裝置安裝工程。
    16.1.2  編制參考標準及規(guī)范
    (1)《建筑電氣工程施工質量驗收規(guī)范》(GB 50303-2002)；
    (2)《建筑設備安裝分項工程施工工藝標準》；
    (3)《建筑安裝工程施工圖集》。
    16.2  術語、符號
    接地裝置：是指將雷電流或設備漏電電流導人大地的裝置，一般由接地線和接地體組成。
    16.3  基本規(guī)定
    (1) 接地裝置的埋設深度其頂部不應小于0.6m，角鋼及鋼管接地極應垂直配置。
    (2) 垂直接地極長度不應小于2.5m，其相互之間的間距如設計無要求，一般不小于5m。
    (3) 接地裝置埋設位置距建筑物不宜小于1.5m，遇在垃圾灰渣等處埋設接地裝置時，應換土并分層夯實。
    (4) 當接地裝置必須埋設在距建筑物出人口或人行道小于3m時，應采用均壓帶做法或在接地裝置上面0.2m處敷設50～90mm厚的瀝青層，其寬度應超過接地裝置2m。通過人行通道的接地裝置埋深大于3m時，可不設瀝青層。
    (5) 接地干線的連接應采用焊接，焊接處焊縫應飽滿，并有足夠的機械強度，不得有夾渣、咬肉、裂紋、虛焊、氣孔等缺陷，焊接處的藥皮敲凈后，刷瀝青做防腐處理。
    (6) 明敷設接地干線穿墻時，應加套管保護，跨越伸縮
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
 

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