電纜橋架施工是電氣工程中的重要環(huán)節(jié)，其工藝流程需嚴格按照規(guī)范執(zhí)行，確保安全性和功能性。

　　The construction of cable trays is an important part of electrical engineering, and its process must be strictly executed according to specifications to ensure safety and functionality.

　　下面詳細介紹電纜橋架施工流程及關(guān)鍵要點：

　　Below is a detailed introduction to the construction process and key points of cable tray:

　　一、電纜橋架施工準備

　　1、 Preparation for cable tray construction

　　1. 圖紙審核

　　1. Drawing review

　　確認設計圖紙的橋架走向、規(guī)格、標高及與其他管線的交叉位置。

　　Confirm the cable tray direction, specifications, elevation, and intersection position with other pipelines on the design drawings.

　　核對預留孔洞、預埋件位置是否符合要求。

　　Check whether the reserved holes and embedded parts positions meet the requirements.

　　2. 材料與工具準備

　　2. Preparation of materials and tools

　　橋架（槽式、梯式、托盤式等）、支架、連接件、接地線等材料檢驗（規(guī)格、防腐處理）。

　　Inspection of materials such as cable trays (trough, ladder, tray, etc.), brackets, connectors, grounding wires, etc. (specifications, anti-corrosion treatment).

　　準備電鉆、切割機、水平儀、扳手等工具。

　　Prepare tools such as electric drills, cutting machines, level gauges, wrenches, etc.

　　3. 技術(shù)交底與安全措施

　　3. Technical disclosure and safety measures

　　施工人員熟悉圖紙及規(guī)范，進行安全培訓（如高空作業(yè)、臨時用電防護）。

　　Construction personnel are familiar with the drawings and specifications, and receive safety training (such as high-altitude operations and temporary electrical protection).

　　二、電纜橋架定位放線

　　2、 Cable tray positioning and laying out

　　1. 彈線定位

　　1. Bullet line positioning

　　依據(jù)圖紙在墻面或頂板標記橋架中心線及支架位置，使用激光儀確保水平/垂直精度。

　　Mark the centerline and support position of the bridge on the wall or roof according to the drawing, and use a laser to ensure horizontal/vertical accuracy.

　　標注轉(zhuǎn)彎、分支、標高變化等關(guān)鍵點。

　　Mark key points such as turns, branches, and elevation changes.

　　2. 間距與避讓原則

　　2. Distance and Avoidance Principle

　　橋架與熱力管道間距≥0.5m，與其他管道≥0.3m，交叉時采用局部降板或爬升處理。

　　The distance between the bridge and the thermal pipeline is ≥ 0.5m, and ≥ 0.3m with other pipelines. Local lowering or climbing treatment is used when crossing.

　　三、電纜橋架支架安裝

　　3、 Installation of cable tray supports

　　1. 支架選型與固定

　　1. Bracket selection and fixation

　　根據(jù)荷載選擇角鋼、通絲吊桿等支架類型，膨脹螺栓固定深度≥螺栓直徑的1.2倍。

　　Select bracket types such as angle steel and threaded suspension rods based on the load, and fix expansion bolts with a depth of at least 1.2 times the bolt diameter.

　　間距要求：水平段1.5~3m，垂直段≤2m，轉(zhuǎn)彎處兩側(cè)增設支架。

　　Spacing requirement: Horizontal section is 1.5-3m, vertical section is ≤ 2m, and brackets are added on both sides of the turning point.

　　2. 調(diào)平與防腐

　　2. Leveling and anti-corrosion

　　支架安裝后調(diào)整水平度，偏差≤2mm/m，焊接處補刷防銹漆。

　　After the support is installed, the levelness shall be adjusted, the deviation shall be ≤ 2mm/m, and the welding point shall be brushed with antirust paint.

　　四、電纜橋架組裝

　　4、 Cable tray assembly

　　1. 主體安裝

　　1. Main body installation

　　從起點向終點逐段安裝，采用連接板跨接，螺母朝外，縫隙≤2mm。

　　Install section by section from the starting point to the ending point, using connecting plates for bridging, with nuts facing outward and gaps ≤ 2mm.

　　轉(zhuǎn)彎處使用成品彎頭，彎曲半徑≥電纜非常小允許半徑（如多芯電纜≥12倍直徑）。

　　Use finished elbows at the turning point, with a bending radius ≥ the minimum allowable radius of the cable (such as multi-core cables ≥ 12 times the diameter).

　　2. 多層橋架布置

　　2. Multi layer bridge layout

　　強弱電分層敷設：控制電纜在上，電力電纜在下，層間距≥0.3m（或按設計要求）。

　　Layered laying of strong and weak electricity: Control cables are placed on top, power cables are placed on the bottom, and the interlayer spacing is ≥ 0.3m (or according to design requirements).

　　加裝隔板分隔不同電壓等級電纜。

　　Install partitions to separate cables of different voltage levels.

　　五、接地處理

　　5、 Grounding treatment

　　1. 全程電氣連通

　　1. Electrical connectivity throughout the entire process

　　每隔30~50m設置接地點，非鍍鋅橋架連接處跨接≥4mm?銅芯接地線。

　　Set grounding points every 30-50m, and cross connect copper core grounding wires of ≥ 4mm at non galvanized bridge connections.

　　鍍鋅橋架可利用連接板作跨接，但需去除接觸面涂層確保導通。

　　Galvanized cable trays can use connecting plates for bridging, but the contact surface coating needs to be removed to ensure conductivity.

　　2. 接地電阻測試

　　2. Grounding resistance test

　　整體接地電阻≤4Ω，連接處接觸電阻≤0.1Ω。

　　The overall grounding resistance is ≤ 4 Ω, and the contact resistance at the connection is ≤ 0.1 Ω.

　　六、電纜敷設

　　6、 Cable laying

　　1. 敷設前檢查

　　1. Pre laying inspection

　　清除橋架內(nèi)雜物，檢查銳邊毛刺處理，避免損傷電纜。

　　Remove debris from the cable tray, inspect sharp edges and burrs to avoid damaging the cables.

　　2. 敷設工藝

　　2. Laying process

　　電纜牽引力≤允許值（如PVC護套電纜≤50N/mm?），轉(zhuǎn)彎處使用滑輪減少摩擦。

　　Cable traction force ≤ allowable value (such as PVC sheathed cable ≤ 50N/mm? ）Use pulleys at turns to reduce friction.

　　固定間距：水平段首尾端、轉(zhuǎn)彎處500mm內(nèi)設固定點，垂直段每間隔1m固定。

　　Fixed spacing: Fixed points are set within 500mm at the beginning and end of the horizontal section and at the turning point, and fixed every 1m in the vertical section.

　　3. 防火封堵

　　3. Fireproof sealing

　　穿越防火分區(qū)時，采用防火泥或耐火板封堵，耐火出色≥1小時。

　　When passing through fire compartments, fireproof mud or fire-resistant boards should be used for sealing, with a fire resistance limit of ≥ 1 hour.

　　七、驗收與記錄

　　7、 Acceptance and recording

　　1. 質(zhì)量檢查

　　1. Quality inspection

　　橋架水平度偏差≤2‰，垂直度≤5‰，全長偏差≤20mm。

　　The horizontal deviation of the bridge frame is ≤ 2 ‰, the vertical deviation is ≤ 5 ‰, and the total length deviation is ≤ 20mm.

　　接地導通性測試，電纜絕緣測試（如1000V搖表測絕緣≥10MΩ）。

　　Grounding continuity test, cable insulation test (such as insulation ≥ 10M Ω measured by a 1000V megohmmeter).

　　2. 資料歸檔

　　2. Data archiving

　　整理隱蔽工程驗收單、材料合格證、接地測試報告等。

　　Organize concealed engineering acceptance forms, material qualification certificates, grounding test reports, etc.

　　其他關(guān)鍵注意事項

　　Other key precautions

　　伸縮節(jié)設置：直線段超過30m時，需加裝伸縮節(jié)補償熱脹冷縮。

　　Expansion joint setting: When the straight section exceeds 30m, expansion joints need to be installed to compensate for thermal expansion and contraction.

　　標識管理：橋架貼敷走向標簽，電纜兩端掛編號牌。

　　Identification management: Cable trays are labeled with direction tags, and numbered plates are hung at both ends of the cables.

　　成品保護：施工中避免踩踏橋架，焊接作業(yè)時遮蓋防火布。

　　Finished product protection: Avoid stepping on the bridge during construction, and cover with fireproof cloth during welding operations.

　　施工中，通過以上流程的嚴格執(zhí)行，可確保電纜橋架系統(tǒng)安全可靠，為后續(xù)設備供電及維護提供基礎(chǔ)。

　　During construction, strict implementation of the above process can ensure the safety and reliability of the cable tray system, providing a foundation for subsequent equipment power supply and maintenance.

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