山東電纜橋架的直段之間、直段與彎頭之間、變徑直通的連接件，應(yīng)使用橋梁生產(chǎn)廠家配套的連接件。連接件薄鋼板的厚度不應(yīng)小于橋架薄鋼板的厚度。

The connectors between the straight sections of Shandong cable tray, between the straight sections and elbows, and through reducing shall use the connectors matching the bridge manufacturer. The thickness of the connecting piece steel sheet shall not be less than that of the bridge steel sheet.

界面應(yīng)平整，無變形、凸起和凹陷。用于連接的半圓頭鍍鋅螺栓應(yīng)在橋的內(nèi)側(cè)。螺栓的長度應(yīng)適當(dāng)。擰緊后外露長度應(yīng)為2～5齒。對于水平安裝的橋梁，其直段的連接件應(yīng)盡量設(shè)置在兩支吊架距離的1/4左右。

The interface shall be flat without deformation, bulge and depression. Half round head galvanized bolts for connection shall be on the inside of the bridge. The length of bolts shall be appropriate. The exposed length after tightening shall be 2 ~ 5 teeth. For horizontally installed bridges, the connectors of the straight sections shall be set at about 1/4 of the distance between the two supports and hangers as far as possible.

一般情況下，施工現(xiàn)場不搭橋。由于特殊原因，現(xiàn)有的橋架可用于制作非標(biāo)準(zhǔn)彎曲和變徑。

Generally, there is no bridge at the construction site. Due to special reasons, the existing bridge can be used to make non-standard bending and reducing.

對直段橋進行修改和切割時，不得使用氣焊或電焊進行切割，應(yīng)使用專用切割工具。改造后的橋架必須平整，并及時重新粉刷油漆。面漆的顏色應(yīng)與其他橋架的顏色相近。

When modifying and cutting the straight section bridge, gas welding or electric welding shall not be used for cutting, and special cutting tools shall be used. The reconstructed bridge must be flat and repainted in time. The color of finish paint shall be similar to that of other bridges.、

在橋梁跨越建筑物的伸縮縫處，按照GB50168的規(guī)定，應(yīng)設(shè)置伸縮縫，以保證橋梁和橋內(nèi)鋪設(shè)的電纜在不危及建筑物自身的情況下能伸縮自如，不受損壞。

At the expansion joints where the bridge crosses the building, expansion joints shall be set according to the provisions of GB50168 to ensure that the bridge and the cables laid in the bridge can expand freely without damaging the building itself.

因為在新建建筑中，橋梁安裝一般在混凝土結(jié)構(gòu)工程竣工后幾個月甚一年后進行，混凝土的收縮率逐漸減小。伸縮量一般不超過建筑物伸縮縫的寬度L。

Because in new buildings, the bridge installation is generally carried out a few months or even a year after the completion of the concrete structure project, and the shrinkage rate of the concrete gradually decreases. Generally, the expansion amount shall not exceed the width l of the expansion joint of the building.

如發(fā)現(xiàn)或從土建單位獲悉建筑物的伸縮縫有可能超過L，應(yīng)根據(jù)實際情況進行伸縮處理。

If it is found or learned from the civil engineering unit that the expansion joint of the building may exceed L, expansion treatment shall be carried out according to the actual situation.

跨越伸縮縫的橋梁少一側(cè)有較長的直線段，應(yīng)超過30m，或伸縮縫兩側(cè)的橋梁總長度為30m，且山東電纜橋架的橋梁內(nèi)不存在水平或垂直彎曲中間。為了在橋架內(nèi)留出電纜（或電線）的伸縮余量，該余量應(yīng)大于伸縮縫的寬度L。

At least one side of the bridge crossing the expansion joint has a long straight section, which should be more than 30m, or the total length of the bridge on both sides of the expansion joint is 30m, and there is no horizontal or vertical bending middle in the bridge of Shandong cable tray. In order to reserve expansion allowance for cables (or wires) in the bridge, the allowance shall be greater than the width l of the expansion joint.

此外大多數(shù)金屬橋的化學(xué)性質(zhì)比較活潑，容易與空氣中的氧氣和水分發(fā)生化學(xué)反應(yīng)，產(chǎn)生腐蝕。即便如此，由于金屬的強度和硬度遠高于其他物質(zhì)，金屬仍然是工業(yè)生產(chǎn)的主要原料。為了防止金屬制品在使用過程中受到腐蝕的影響，幾乎所有的金屬鑄件都需要進行涂層處理。涂層可以很好地隔離原始金屬與空氣，避免腐蝕。涂層保護前，金屬表面已輕微生銹，涂層前應(yīng)清潔表面。

In addition, the chemical properties of most metal bridges are relatively active, and they are easy to react with oxygen and moisture in the air to produce corrosion. Even so, because the strength and hardness of metals are much higher than other substances, metals are still the main raw materials for industrial production. In order to prevent metal products from being affected by corrosion during use, almost all metal castings need coating treatment. The coating can well isolate the original metal from the air and avoid corrosion. Before coating protection, the metal surface has slightly rusted, and the surface shall be cleaned before coating.

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