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民用建筑防雷与接地装置是什么样的？

民用建筑防雷与接地装置是什么样的？

浏览：35次 | 提问时间： 08-06 08:37

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3个答案

Agon暮念 08-06 08:38

一、防雷接地的一般组成
(1）雷电接受装置：直接或间接接受雷电的金属杆（接闪器），如避雷针、避雷带（网）、架空地线及避雷器等；
（2）接地线（引下线）：雷电接受装置与接地装置连接用的金属导体。它的作用是把雷电接受装置上的雷电流传递到接地装置上，接地线一般采用圆钢或扁钢组成；
（3）接地体：包括接地装置和装置周围的土壤或混凝土，作用是把雷击电流有效地泄入大地，现在常用的接地装置有水平接地极、垂直接地极、延长接地极和基础接地极。
二、避雷网安装定额问题（1）沿混凝土块敷设

万般努力只为出人头地 08-06 08:46

民用建筑防雷与接地装置包括接闪装置、引下线和接地装置三个部分。

　　1、接闪装置

　　装在建筑物的最高处，必须露在建筑物外面，可以是避雷针、避雷线、避雷带或避雷网，也有将几种形式结合起来使用的。

　　2、引下线

　　一般采用镀锌钢绞线，将接闪装置和接地装置连接成一体，要注意其截面大小，连接可靠和以最短途径接地。引下线分布要合理对称，不应紧靠门、窗。钢筋混凝土建筑物的钢筋和钢柱等也可当作引下线使用。

　　3、接地装置

　　是使电流通过接地电极向大地泄放。一般采用镀锌的圆钢、角钢、扁钢等连接成水平接地环、接地带或垂直接地体，埋于一定深度的湿土中。现代建筑物的钢筋混凝土基础也可以作为接地装置。

爱情 08-06 08:54

建筑物的防雷接地装置是由接闪器、引下线、接地体三大部分构成。
接地体大致分为人工接地体和利用深基础做接地体两种。
(1)人工接地体：因房屋屋面大小不同而设置一至几组接地体，每组一至几根镀锌角钢∠50×50×5长2.5米，间隔3米打入潮湿的地下土里，顶部低于自然地面0.7米，以镀锌扁钢40×4焊连，覆盖回填土，并以镀锌元钢引出地上连接测试卡盒，上接引下线。
(2)利用深基础做接地体：高层建筑，利用柱子钢筋做引下线

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