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膜結構車棚防雷的措施有哪些?
來源:http://www.baokangjixie88.com/ 發布時間:2021-12-07
膜結構車棚是現代非常流行的一種車棚建筑,對于這類車棚的防雷措施應根據不同的設計造型及覆蓋面積進行設計。膜結構車棚的防雷措施如下:
Membrane structure shed is a very popular shed building in modern times. The lightning protection measures for this kind of shed should be designed according to different design shapes and coverage areas. Lightning protection measures for membrane structure shed are as follows:
1、接閃功能在防雷設計時,不應只考慮接閃部分的功能,應根據膜結構車棚建筑的結構形式、內部設計和建筑物防雷的相關因素及其規律,考慮防雷方式和應采取的措施,以達到接閃后的功能效果。
1. In lightning protection design, the lightning protection function shall not only consider the function of the lightning protection part, but also consider the lightning protection mode and measures to be taken according to the structural form of membrane structure shed building, internal design and relevant factors and laws of building lightning protection, so as to achieve the functional effect after lightning protection.
2、分流影響設置防雷引下線的數量,是關系到膜結構車棚被雷擊后是否產生擴大事故的重要因素。每根引下線所承受的電流愈小,則其反擊的機會和感應范圍的影響就小,所以引下線的根數應適當多些,且其位置應適當。
2. Shunting affects the number of lightning protection downleads, which is an important factor related to whether there is an expansion accident after the membrane structure shed is struck by lightning. The smaller the current each downlead bears, the smaller the chance of counterattack and the influence of induction range. Therefore, the number of downleads should be appropriate and their positions should be appropriate.
3、合理布線各種金屬管線和防雷系統有直接或間接的關系,因此需考慮建筑物內部的電力系統、電訊系統、 照明系統、電子系統和各種金屬管線的布線位置、走向和防雷系統的距離之間的關系,重要建筑物內各種電氣線路 都需穿金屬管或采用金屬屏蔽電纜,而膜結構車棚建筑各種豎向的管道、金屬支架等均宜在上下與防雷系統可靠連接。
3. Reasonable wiring of various metal pipelines has a direct or indirect relationship with the lightning protection system. Therefore, the relationship between the wiring position and direction of the power system, telecommunications system, lighting system, electronic system and various metal pipelines in the building and the distance of the lightning protection system should be considered. It is important that all electrical circuits in the building should wear metal pipes or adopt metal shielded cables, Various vertical pipes and metal supports of membrane structure shed building should be reliably connected with lightning protection system from top to bottom.
4、接地效果接地效果的好壞也是防雷安*的重要保證,對每個建筑物都要考慮采用哪些接地方式及電位分布 的陡度較小并應盡可能達到均衡電位的條件,接地裝置要適用、耐久;同時需達到規定接地電阻的要求,膜結構建筑常采用基礎鋼筋作自然接地體,通常采用聯合接地方式,要求接地電阻<1Ω。
4. Grounding effect the quality of grounding effect is also an important guarantee for lightning protection safety. For each building, it is necessary to consider which grounding methods should be adopted and the steepness of potential distribution should be small, and the conditions of equalizing potential should be achieved as far as possible. The grounding device should be applicable and durable; At the same time, it is required to meet the requirements of the specified grounding resistance. The foundation reinforcement is often used as the natural grounding body for membrane structure buildings. The combined grounding mode is usually adopted, and the grounding resistance is required to be less than 1 Ω.
5、屏蔽作用對于建筑物的屏蔽,不僅使室內的各種電子設備、儀器、計算機及通訊設備等受到可靠保護,而且是防護球雷和側擊雷的方式。在必要的建筑物上應當考慮屏蔽措施,以防止球雷、側擊雷及電子設備等產生誤動作或被擊穿的可能。
5. The shielding effect on buildings can not only reliably protect various indoor electronic equipment, instruments, computers and communication equipment, but also protect ball mines and side lightning. Shielding measures shall be considered on necessary buildings to prevent misoperation or breakdown of ball lightning, side lightning and electronic equipment.
6、均衡電位為保證建筑物內部不產生反擊,不產生接觸電壓和跨步電壓,應當使膜結構車棚建筑物內部人員能接觸到的金屬設備及管線能達到同一個電位,這是保證人身安*和各種金屬設備不受反擊的重要條件之一。
6. Equalizing potential in order to ensure that there is no counterattack, contact voltage and step voltage inside the building, the metal equipment and pipelines that can be contacted by the personnel inside the membrane structure shed building should reach the same potential, which is one of the important conditions to ensure that personal safety * and various metal equipment are free from counterattack.
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